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Alpine is a borough in Bergen County, New Jersey, United States, approximately 15 miles (24 km) north of Midtown Manhattan. It is the easternmost community in the State of New Jersey. As of the 2010 United States Census, the borough's population was 1,849, reflecting a decline of 334 (−15.3%) from the 2,183 counted in the 2000 Census, which had in turn increased by 467 (+27.2%) from the 1,716 counted in the 1990 Census.In 2012, Forbes ranked Alpine as America's most expensive ZIP Code with a median home price of $4.25 million, after being ranked 4th in the magazine's 2010 listing of "America's Most Expensive ZIP Codes", with a median home price of $3,814,885. In 2009, Forbes ranked Alpine first, along with Greenwich, Connecticut, with a median home price of $4.14 million. Alpine was tied with Greenwich for first in both 2006 and 2007 on the ABC News list of most expensive ZIP Codes, with a median home sale price of $3.4 million. In 2019, PropertyShark ranked Alpine as the 53rd most expensive ZIP Code in the country with a median sales price of $1,785,000, a drop from a ranking of 33rd nationwide in 2018 due to a decline of 19% in sales prices. Based on data from the 2006-2010 American Community Survey, the borough had a per-capita income of $107,604, ranked second in the state.New Jersey Monthly magazine ranked Alpine as its 15th best place to live in its 2008 rankings of the "Best Places To Live" in New Jersey.Alpine was formed by an act of the New Jersey Legislature on April 8, 1903, from portions of Harrington Township. The borough acquired a portion of Cresskill in 1904. The borough's name came from the wife of journalist Charles Nordhoff, who found the setting reminiscent of the Swiss Alps.

The Palisades, also called the New Jersey Palisades or the Hudson River Palisades, are a line of steep cliffs along the west side of the lower Hudson River in Northeastern New Jersey and Southeastern New York in the United States. The cliffs stretch north from Jersey City about 20 miles (32 km) to near Nyack, New York, and visible at Haverstraw, New York. They rise nearly vertically from near the edge of the river, and are about 300 feet (90 m) high at Weehawken, increasing gradually to 540 feet (160 m) high near their northern terminus. North of Fort Lee, the Palisades are part of Palisades Interstate Park and are a National Natural Landmark.The Palisades are among the most dramatic geologic features in the vicinity of New York City, forming a canyon of the Hudson north of the George Washington Bridge, as well as providing a vista of the Manhattan skyline. They sit in the Newark Basin, a rift basin located mostly in New Jersey. Palisade is derived from the same root as the word pole, ultimately from the Latin word palus, meaning stake. A "palisade" is, in general, a defensive fence or wall made up of wooden stakes or tree trunks. The Lenape called the cliffs "rocks that look like rows of trees", a phrase that became "Weehawken", the name of a town in New Jersey that sits at the top of the cliffs across from Midtown Manhattan.

The Armstrong Tower, also known as Alpine Tower, is a distinctive 129.5 meter (425 foot) tall lattice tower featuring three large cross-arms, located atop the Alpine, New Jersey palisades overlooking the Hudson River a few kilometers north of New York City at 40°57'39.0" N and 73°55'21.0" W (40.9607 -73.9225). It is owned by Alpine Tower Company and managed by CSC Management, LLC, both owned by Charles E. Sackermann, Jr.The tower is the permanent transmitter site for locally based experimental station WA2XMN and Fairleigh Dickinson University's educational FM station WFDU, in additional to numerous directional radio services (including as a cell site). It is clearly visible from across the Hudson River and is used as a Visual flight rules waypoint by aircraft flying within the New York City Special flight rules area.The tower was originally constructed by inventor Edwin Howard Armstrong in 1938 for developmental activities that led to modern FM radio. The original transmissions (W2XMN) occurred at 42.8 MHz. At the tower base is a building originally used for research by Armstrong, which still has the W2XMN call sign engraved above its main entrance. This building currently houses the Armstrong Field Laboratory, and serves as a museum containing artifacts from the development of FM radio technology.The structure was also used as a temporary transmitter site for some of New York City's television stations after the collapse of the World Trade Center, including its transmitting antenna, during the September 11, 2001 attacks.

WA2XMN is an experimental FM radio station which broadcasts sporadically from the Armstrong Tower in Alpine, New Jersey. The station commemorates the pioneering broadcasts of the world's first FM radio station, W2XMN, built by Edwin Howard Armstrong, which began experimental broadcasts from this tower in June 1938 followed by full power broadcasting beginning on July 18, 1939. Armstrong's station signed off as KE2XCC on March 6, 1954.WA2XMN broadcasts at 42.8 MHz, one of the frequencies used by Armstrong's station on the original 42-50 MHz FM broadcast band. Transmitting from near the top of the 425-foot tall Armstrong Tower, which sits on top of the 500-foot-tall Pallisades (for a total height of over 900 feet above mean sea level), WA2XMN has a listening range of roughly 60–100 miles. The building at the base of the tower still has the W2XMN call sign engraved above the entrance.The station signed on using a restored Phasitron transmitter built by Steve Hemphill, with technical assistance from WFDU 89.1, which has broadcast from the tower since its first sign on in 1971. The WA2XMN broadcasts have been simulcast on WFDU's FM signal and internet stream, allowing listeners who lack a VHF receiver that can tune to 42.8 MHz to listen to the broadcasts.

WFDU (89.1 MHz) is a public radio station licensed to Fairleigh Dickinson University in Teaneck, New Jersey. Founded in 1971, WFDU's studios are on campus, with its transmitter on the Armstrong Tower in Alpine, New Jersey. Following negotiations with New York University and the Federal Communications Commission, an agreement was reached for the two Universities to share the 89.1 frequency on the FM band. While WFDU and WNYU-FM share the frequency, each station maintains separate transmitter and studio facilities as well as discrete programming and personnel. The station's broadcast signal has up to a 60-mile radius of its transmitter within the historic Armstrong Field Lab in Alpine. The AFL is the site of the world's first FM station, W2XMN, built by the creator of FM technology, Major Edwin Howard Armstrong. With an increase in antenna height and a power rise to 3,000 watts, WFDU has the potential to reach 8.2 million people. In August 2015, WFDU launched two new HD channels: HD2, which is now called "Eclectic Sound", and HD3, which is now called "Student Voice of FDU".

Greystone station is a commuter rail stop on the Metro-North Railroad's Hudson Line, located in the Greystone neighborhood of Yonkers, New York. It is the northernmost station on the Hudson Line in Yonkers. North and Southbound trains leave the station at about every hour. The station is 17.1 miles (27.5 km) from Grand Central Terminal and travel time to Grand Central is about 50 minutes. As of August 2006, daily commuter ridership was 513 and there are 250 parking spots.

The Edwin H. Armstrong House, in Yonkers in Westchester County, New York, is unusual for having achieved listing on the National Register of Historic Places and even designation as a National Historic Landmark, only to be demolished. Its subsequent removal from National Historic Landmark status is the only such occurrence for a New York State site. It was the home of Edwin H. Armstrong, inventor of two circuits that are the basis of modern telecommunication systems, and also inventor of wide-band frequency modulation (FM) radio.The home, a Queen Anne house, was located at 1032 Warburton Avenue in Yonkers.It was designated a National Historic Landmark on January 7, 1976. It was demolished in 1983 after suffering fire damage. It was subsequently de-designated as a National Historic Landmark and delisted from the National Register of Historic Places in 1986.

Museum Middle School was a public middle school in Yonkers, New York, United States. Museum Middle School was run by the Yonkers Public Schools. Museum was home to the city's academically talented (AT) program for middle schoolers and another program coordinated with the Hudson River Museum next to the school. It is in one of the newest school buildings in Yonkers, having been built in the early 1990s. It is near the Hudson River. Principals were Dr. Catherine Mayus, Ms. Christine Wagner, and Mr. Shapiro.Museum Middle School is now Riverside High School for Engineering and Design.

Riverside High School for Engineering and Design is Yonkers' 6th public high school. It opened to 9th grade students in September 2007. Riverside High School is also known as RED (Riverside Engineering and Design) and aims to be environmentally friendly. Its first graduating class is the class of 2011. This building was constructed in 1990 and opened in 1992 as Museum Middle School.

Untermyer Park and Gardens is a historic 43-acre (17 ha) city public park, located in Yonkers, New York in Westchester County, just north of New York City. The park is a remnant of Samuel Untermyer's 150-acre (61 ha) estate "Greystone". Situated on the steep land arising from the eastern bank of the Hudson River to the bluff on top of it, the park features a Walled Garden inspired by ancient Indo-Persian gardens, a small Grecian-style open-air amphitheater with two facing sphynxes supported by tall Ionic columns, a classical pavilion, stoa and loggias, a rock-and-water feature called "The Temple of Love", as well as a long staircase from the Walled Garden to an Overlook with views of the river and the Palisades. The gardens were developed beginning in 1916 by Untermyer, a prominent lawyer and civic leader, and were designed by architect and landscape designer William W. Bosworth, with fountains by Charles Wellford Leavitt, and sculptures by Paul Manship and other artists. The gardens were regularly opened to the public, hosted performances of noted dancers, actors and musicians, and were considered to be among the finest gardens in the United States. When Untermyer died in 1940, he had hoped to donate the whole estate to the United States, or the State of New York, or at least to the City of Yonkers. Eventually Yonkers agreed to accept part of the estate. The parcel, which was the core of the gardens, and which has been added to since that time, was renamed Untermyer Park and Gardens in his honor. It was added to the National Register of Historic Places in 1974.Untermyer Gardens have recently undergone a significant campaign of restorations, which is continuing.

Spann House is an historic Victorian-style building in Yonkers, New York. Spann House was constructed in 1897 as a single-family residence. The house was built in regional stone at a time when all the neighboring houses were built in wood. Spann House is one of the few buildings in Yonkers with entirely stone bearing walls. Spann House was converted to a multifamily residence in 1931. In 1999, it was purchased and renovated.

Glenview Mansion, listed on the National Register of Historic Places as the John Bond Trevor House, is located on Warburton Avenue in Yonkers, New York, United States. It is a stone house erected during the 1870s in an eclectic Late Victorian architectural style from a design by Charles W. Clinton. It was listed on the Register in 1972. It is one of the few remaining buildings in Yonkers made of locally quarried greystone. Inside there is fine Eastlake cabinetry by the prominent Philadelphia cabinetmaker Daniel Pabst and other decorations and finishes; it is considered one of the finest interiors in that style in an American building open to the public.Financier John Bond Trevor built the house as a small country estate that was nevertheless close enough to New York City to allow him to commute to his job in the city by rail. At the time he and his family moved in, it was surrounded by similar houses. By the time Trevor's second wife died in the early 1920s, Glenview had become the center of a suburban neighborhood. The design of the house and the way the Trevors lived there epitomizes the transition between country living and the modern suburb. In 1929, after the Trevor family had moved out, the house became home to the Hudson River Museum for the next 45 years. The museum has since expanded but the house remains part of the complex. Its rooms have been refurbished in the style of the period, and are open to visitors. Renovations in the early 21st century have better integrated the house with the rest of the museum.