The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Though tiki culture has gone in and out of fashion, the Tonga Hut has always been flying the flag in Los Angeles.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

A nostalgic bibliographic gem.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Where the line between entertainment and aerospace blurs.

The walls of the iconic dome are hollow and have a secret stairway.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The famous author's cottage hideaway.

A library and museum dedicated to typography.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

A collection of colorful dinosaurs hidden in an actual rainforest.

An unrealized dream to wirelessly electrify the entire Earth.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

An alternate history park where the Union Army loses the war... to dinosaurs.

35,000 grape hyacinths flow like water down a garden hill.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.