O’Brien Oval
Captain Thomas A. O’Brien was born in 1884 and grew up at 280 Burnside Avenue, just a few blocks away. O’Brien w...

O’Neill Triangle
The identity of O’Neill Triangle’s namesake is something of a mystery. The Board of Aldermen named it O’Nei...

O’Connell Playground
This park is named after Daniel M. O’Connell (1900-1918), a native of New York City who gave his life for his country in...

O’Connor’s Tail
Frank D. O’Connor (1909-1992), for whom this park is named, had a remarkable career in public life that spanned four dec...

Oak Ridge
Standing in a grove of red and black oaks, Oak Ridge is located on the crest of the Harbor Hill Moraine (a mass of rock formed...

Oakland Gardens
This playground takes its name from the northeastern Queens neighborhood in which it stands. The neighborhood of Oakland Gard...

Oakland Lake
Oakland Lake is a 15,000-year-old spring-fed glacial kettle pond located in Alley Pond Park. The lake, once known as Mill Pon...

Ocean Hill Playground
This playground is named for the Ocean Hill residential section of Brownsville, Brooklyn founded in 1890. Over the past centu...

Ocean Parkway
In 1866, Frederick Law Olmsted and Calvert Vaux conceived of a network of wide, tree-lined avenues that would cut across the g...

Ogden Plimpton Playground
This playground takes its name from two avenues that border the property: Ogden Avenue and Plimpton Avenue. The park is also ...

Old Fort Four Park
The American Revolution (1763-1789), the fight for our nation's independence from British rule, irrevocably sh...

Old Hickory Park
Andrew “Old Hickory” Jackson (1767-1845) was the seventh president of the United States. He earned the nickname, ...

Old Town Playground
This playground is named for Old Town, the surrounding neighborhood which was the first European settlement in Staten Island, ...

Olinville Playground
This playground bears the name of the Bronx neighborhood of Olinville, named after the author, professor and Methodist bishop,...

Oliver Hazard Triangle
This triangle, located in the Queens neighborhood of Maspeth in the shadow of the Long Island Expressway, is named in honor of...

Olmstead Triangle
Olmstead Triangle and the adjacent Avenue honors the Olmsteads. Settlers of Westchester Village, their gravestones remain in ...

Olmsted Center
Described as a “valley of ashes” in F. Scott Fitzgerald’s (1896–1940) The Great Gatsby (1925) because ...

One Room Schoolhouse Park
Queens' last one-room schoolhouse occupied this site from the time of its construction in 1879 until its demolition to mak...

Oneida Triangle
Neighbor to 1,146.43 acre Van Cortlandt Park, Oneida Triangle is bounded by East 238th Street, Van Cortlandt Park East, and On...

Oracle Playground
Oracle Playground is named for its proximity to Adelphi Street, which runs to the west of this site. The word Adelphi has gre...