Quite simply the largest tree in the world (by volume).

Mysterious 500-year-old tapestries depict a unicorn hunt.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Venue for strange sideshow displays and musical acts.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A huge musical instrument played by the ocean.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Even in death, he's still your huckleberry.

The fifth-longest natural arch in the world, and the longest outside China.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

A house carved into a rock in the 1940s.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Visitors to this library are in for a real-world education in modernist architecture.

A replica that won't float away.

An architectural oddity hides in plain sight on this iconic London bridge.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

This historic hotel invented the chocolate brownie.

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

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.