Take a trip to the past aboard a 1920s railcar or open flatcar for a scenic ride through Maryland farm country.

A unique marker erected during the 18th century.

The land is home to swimming ponies and a legendary 18th-century treasure.

Once America's longest-manned military fort, now an abandoned hulk.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

Three-story slide through the New Museum.

New York City's only radical feminist independent bookstore.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

One of the only single-person private gravesites in New York City.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

New York City's first Modernist house.

Nope, not Washington Irving's house.

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

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

The first piece of public art dedicated to LGBT rights.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

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

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

There are owls with glowing eyes in Herald Square.

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

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.