This restored house is like a time capsule of the president's unconventional inauguration.

Home to a giant switchblade and one of the world's largest collections of pocket knives, this museum is a cut above the rest.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

A trompe-l'oeil statue honoring the first guide dog in North America.

All that remains of the once-booming chain is a single orange-roofed restaurant.

A crumbling hospital from the 1850s on Roosevelt Island.

During the holidays, a vintage subway train whisks New Yorkers back in time.

The flagship building of an early national restaurant chain is a superb example of terra cotta art.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

A bit of retro transportation flair preserved in the world's largest department store.

New York City's only preserved family home from the 19th century.

A castle built for love, and abandoned due to heartbreak.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

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

The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

Restaurant in a 1741 farmhouse that touts the story of its haunting on its menus.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This once luxurious Catskills resort is now a haunting ruin.

The largest known open fault in the United States is basically a giant natural refrigerator.

Spies, love letters, and ghost stories have all left their mark on this home-cum-museum.