This dramatic rail curve was once the target of a failed Nazi attack.

Steepest flood safety railway in the entire world.

A local prank turned town icon.

This elaborate towering structure was once famed for its revolutionary height.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Mysterious rocks that ring musically when struck.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

The magic's in the hole!

An aptly-named street near the birthplace of the modern LGBT rights movement.

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

The first piece of public art dedicated to LGBT rights.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.