The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

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

More than five miles of underground passageways.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of few remaining antique carousels with stationary animals in the U.S.

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

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

Over 50 whirling pools left behind from the glacial age.

An idle pastime becomes a record holder in Boys Town, Nebraska.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Every president in history is immortalized in bronze in downtown Rapid City.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This quaint museum lets you take a ride on its antique carousels.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

Home to Hollywood history and a very special salt crystal.

A luxuriant botanical garden below sea level.

Walk in the footsteps of the gods and straddle two tectonic plates.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.