A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

The home of the first American-born saint is one of the only curved buildings in New York.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Red frames showcase remnants of one of New York's original subway stations.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

The first piece of public art dedicated to LGBT rights.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The mummified relics of an American missionary.

Little Red Lighthouse under the George Washington Bridge.