Leuschner Observatory

Rancho Laguna de Los Palos Colorados was a 13,316-acre (53.89 km2) Mexican land grant in the Berkeley Hills (then called the Sierra de la Contra Costa, "Contra Costa Range") within present-day Contra Costa County, California. It was given in 1841 by Governor Juan Alvarado to Joaquín Moraga and his cousin, Juan Bernal. The name means "Ranch of the Lake of the Redwoods" in Spanish. The rancho included the present-day Orinda, Lafayette and Moraga, as well as the communities of Canyon and Rheem.

Rancho Boca de la Cañada del Pinole was a 13,316-acre (53.89 km2) Mexican land grant in present-day Contra Costa County, California given in 1842 by Governor Juan Alvarado to María Manuela Valencia. The name means "Mouth of the Pinole Valley" in Spanish. The rancho located between present-day Martinez, Pleasant Hill, Orinda, and Lafayette.

Briones Regional Park is a 6,117-acre (24.75 km2) regional park in the East Bay Regional Park District (EBRPD) system, located in the Briones Hills of central Contra Costa County of the San Francisco Bay Area in California.

The Briones Hills form a low mountain range in western Contra Costa County, in the East Bay region of the San Francisco Bay Area, California, United States.

Lamorinda is an area within Contra Costa County, California in the United States. The name is a portmanteau from the names of the three cities that make up the region: Lafayette, Moraga and Orinda.Lamorinda sits east of the Berkeley Hills between the Caldecott Tunnel and Walnut Creek. It is also referred to as the "Highway 24" corridor, referring to the state highway that is the primary thoroughfare in the region. Many residents commute west through the tunnel to San Francisco and Oakland or east to Walnut Creek and Concord. As of 2010 the three cities had a combined population of 57,552, with Lafayette having the largest population and Moraga the smallest.

The Lafayette Reservoir is an open-cut human-made terminal water storage reservoir owned and operated by the East Bay Municipal Utility District (EBMUD). Completed in 1933, it was intended solely as a standby water supply for EBMUD customers. EBMUD opened the reservoir for public recreation in 1966. It is located off of California State Route 24 and a mile from the Lafayette BART station, in Contra Costa County, California, United States. This all-year, day-use area is ideal for hiking, jogging, fishing, boating and picnicking. The reservoir is on the Lafayette-Orinda border. The reservoir is on a 925-acre (3.74 km2) site and holds 1.4 billion US gallons (5,300,000 m3)

The Lafayette hillside memorial is a collection of religious symbols, accompanied by a large sign, in Lafayette, California. The memorial commemorates soldiers killed in the Iraq War and War in Afghanistan, with the sign containing a running total of the death count as recorded by the US Department of Defense. The monument began to raise controversy in November 2006.The hillside, overlooking State Route 24 and Lafayette BART station, was owned by 81-year-old Louise Clark, widow of Johnson Clark, until she died. Johnson Clark was a local developer and World War II veteran. The monument was erected in late 2006 by Jeffrey Heaton, a long-time anti-war protester, and Louise Clark. Their first 19 crosses were quickly removed by vandals. In November 2006 Heaton and Clark re-added the crosses onto Clark's property, this time with 300 crosses and a large sign that read: "In Memory of 2839 U.S. Troops Killed In Iraq". By February 26, 2007, the number of crosses, mixed with Stars of David, Islamic crescents, and other religious symbols, had passed 2,500. Crosses have been added by volunteers and some paid for by the Lamorinda Peace Group and Grandmothers for Peace. Protests of the memorial have been led by Lafayette Flag Brigade which organizes a competing, remembrance flag display annually on September 11.The city ordinance allowed a 32-square-foot (3.0 m2) sign on the property and did not limit the number of crosses. The organizers initially had an approximately 64-square-foot (5.9 m2) sign, but reduced it to 32 square feet (3.0 m2) to comply with the city ordinance. The sign is updated every week to show the new official death toll for soldiers in Iraq and Afghanistan.As of 2014, a permanent memorial has been proposed on the site although the original intent was for the display to come down when U.S. troops came home from Iraq and Afghanistan.

The Black Hills are a mountain range in Contra Costa County, California.

Rancho Acalanes was a 3,329-acre (13.47 km2) Mexican land grant in present-day Contra Costa County, California. It was given in 1834 by Governor José Figueroa to Candelario Valencia. The name Acalanes seems to have come from Ahala-n, the name of a Costanoan native village in the area, or from the Saklan tribe, sometimes known as the Sacalanes The rancho included present-day Lafayette and northern Orinda.

Lafayette station is a Bay Area Rapid Transit (BART) station in Lafayette, California. The station consists of one island platform in the center median of State Route 24 just south of the Lafayette Hillside Memorial.

The Charles W. Merrill House is a 6,000-square-foot residence built in 1938 and located in Orinda, California. Designed by regionally prominent architect Walter H. Ratcliff, of Berkeley, California for mining engineer and San Francisco businessman Charles Washington Merrill.

Orinda is a city in Contra Costa County, California, United States. The city's population as of the 2020 census is estimated at 19,514 residents.