Little Diamond Island

The Battle of Portland Harbor was an incident during the American Civil War, in June 1863, in the waters off Portland, Maine. Two civilian ships engaged two vessels under Confederate States Navy employment.

Fort Gorges is a former United States military fort built on Hog Island Ledge in Casco Bay, Maine, United States. Built from 1858 to 1864, no battles were fought there and no troops were stationed there. Advancing military technology, including iron clad ships and long range guns, rendered the fort obsolete before it could be used. The fort is now a park, accessible only by boat. It was added to the National Register of Historic Places in 1973.

House Island is a private island in Portland Harbor in Casco Bay, Maine, United States. It is part of the City of Portland. The island is accessible only by boat. Public access is prohibited, except for an on-request tour sanctioned by the island's owners. House Island includes three buildings on the east side and Fort Scammell on the west side. The buildings are used as vacation rentals and other summer residences. The island's name derives from the site of an early European house, believed that built by Capt. Christopher Levett, an English explorer of the region.[1][2]The island sold for $5.35m in 2022.

The Umbrella Cover Museum in Peaks Island, Maine is a museum that pays tribute to umbrella covers. The museum was created and is curated by Nancy 3. Hoffman, who has collected more than 2000 umbrella covers from 66 countries as of July 2018.The mission of the Umbrella Cover Museums states that it is "dedicated to the appreciation of the mundane in everyday life. It is about finding wonder and beauty in the simplest of things, and about knowing that there is always a story behind the cover."The idea for the museum came when Hoffman was cleaning out a closet and came across seven umbrella covers. The museum began in Hoffman's kitchen and was moved to a larger location as the collection grew. The museum's collection ranges in size from a two-and-a-half-inch Barbie doll cover to a six-foot patio umbrella sleeve. It has hosted special exhibitions including “People and Their Covers” and “New Umbrella Cover Fashions.”On 7 July 2012, Guinness World Records named Hoffman's umbrella cover collection of 730 at the time to be the largest in the world.The museum is closed during the winter. Guided tours include Hoffman, who is also a musician, singing "Let a Smile Be Your Umbrella" while playing an accordion.

Peaks Island is the most populous island in Casco Bay, Maine. It is part of the city of Portland and is approximately 3 miles (4.8 km) from downtown. The island is served by Casco Bay Lines and is home to its own elementary school, library, and police station. It is the only island in Casco Bay that allows cars throughout the island due to its size. While small, the island hosts a variety of businesses including an ice cream parlor, restaurant, grocery store, kayak rentals, golf cart rentals, art galleries, the Fifth Maine Regiment Museum and the Umbrella Cover Museum, among others.The island was originally known as Pond Island. It became Michael's Island, after Michael Mitton was gifted the island on a sixty-year lease by his father-in-law, George Cleeve. It was subsequently named Munjoy's Island (for George Munjoy) and Palmer's Island (for Munjoy's son-in-law, John Palmer).

Greenwood Garden Playhouse was a theater on Peaks Island, Maine, United States. Completed in 1884, as an open-air roller skating rink, it was converted to a theater in 1898. It became a dance hall prior to its closure in 1957 as a summer stock theater. Jean Stapleton's first professional appearance in the summer of 1941 was in a production at the playhouse. Martin Landau also made his professional stage debut in a 1951 production of Detective Story at Greenwood Garden, where for several seasons he was a resident cast member. Its grounds featured a carousel, a Ferris wheel and a wooden observation tower, which people paid to be able to view Mount Washington, the highest mountain in the Northeastern United States. The playhouse was located on Garden Place, just off Island Avenue, near the southwestern tip of the island. In 2021, the garden was added to the National Register of Historic Places.

Great Diamond Island is an island in Casco Bay, Maine, United States. It is part of the city of Portland. At the 2000 census, the island had a year-round population of 77. The island is not accessible from the mainland by motor vehicle and has a limited network of roads. The primary modes of transportation are golf carts and bicycles. This fact has become a selling point for the island, marketing the area as "car free" and "kid friendly". The island was used as a military base starting in the late 19th century and continuing through World War II. After the base was decommissioned, the bunkers and residences were left idle for over 30 years before being developed and sold to private citizens.

Fort McKinley is a former United States Army coastal defense fort on Great Diamond Island, Maine in Casco Bay, which operated from 1873 to 1947. It was named for President William McKinley. It included a sub-post, Fort Lyon, on Cow Island, just north of Great Diamond Island. Fort Lyon was named for Nathaniel Lyon. Both forts were part of the Coast Defenses of Portland, renamed the Harbor Defenses of Portland in 1925, a command which protected Portland's port and naval anchorage 1895-1950. In 1946 Fort Lyon was closed and turned over to the City of Portland. After Fort McKinley's closure it was transferred to the United States Navy, which sold the site (via the General Services Administration) to private interests in 1961. The Fort McKinley Historic District was listed on the National Register of Historic Places in 1985.

The Fifth Maine Regiment Community Center is a historic building at 45 Seashore Avenue on Peaks Island, an island neighborhood of Portland, Maine in Casco Bay. It was built in 1888 by American Civil War veterans "as a memorial to their deceased comrades and as a reunion hall for themselves." It was listed on the National Register of Historic Places in 1978 and designated a Greater Portland Landmark in 1984. Today it is open as a museum.

The Eighth Maine Regiment Memorial, now the 8th Maine Lodge, is a historic summer fraternal meeting house at 13 Eighth Maine Avenue on Peaks Island, an island neighborhood of Portland, Maine. Built in 1891 as a reunion site for veterans of the American Civil War 8th Maine Volunteer Infantry Regiment, it is a fine example of Shingle style architecture, and an important work of the local architectural firm of Fasset and Tompson. It was listed on the National Register of Historic Places in 2006, and presently operates as a summer lodge and museum, with rooms rented to the public.

Spring Point Ledge Light is a sparkplug lighthouse in South Portland, Maine, that marks a dangerous obstruction on the west side of the main shipping channel into Portland Harbor. It is now adjacent to the campus of Southern Maine Community College.

Cushing Island, or Cushing's Island, is a privately owned island in Casco Bay in the U.S. state of Maine. Part of the city of Portland, roughly 45 families live there seasonally.