One man's swirling six-acre monument of stone.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Visit the monolithic tomb of America's most famous general.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Prove you deserve to be fed by Kenny Shopsin.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A natural gas leak provides a flickering flame beneath a waterfall.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A celebration of capitalism in Midtown.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Impressive artifacts from Juneau's gold mining days fill this mining site-turned-museum.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.