The world's longest known cave system.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

One Confederate statue that accurately reflects the ugliness of its subject.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A bizarre roadside attraction and the first instance of miniature golf in the world.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Victorian-era Egyptomania left its mark on this Nashville landmark.

This historic train station has been converted to a locomotive themed hotel.

Follow the steps, and this roadside artwork will teach you how to dance.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This replica of the Greek structure is in the heart of Nashville.

One person's lost luggage is another person's treasure.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

One of corporate America's best-kept secrets is also one of the most publicly displayed.