Nature's biggest mammal swims in landlocked Oklahoma.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

An acoustic anomaly with a mysterious cause.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

Stay in a room with a view... of the bottom of the ocean.

A coal fire has been burning underground here since 1896.

Natural rock water slides hidden in the remote forests of northern Idaho.

After Havre burned down, the best place to build was under the ashes.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

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

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Mine your own precious stones.

One of the largest collections of carriages, buggies, and wagons in the world.

Local history museum with mammoth bones and an old myth about local giants

A giant milk bottle from the 1930s beckons drivers to this diner.

An obscure waterfall that looks like something out of a fantasy novel.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

A classic mystery spot complete with spots that are said to make you shrink or grow when you stand on them.

Dig for your own trilobites in this goldmine of invertebrates.

After this former brothel closed, its interior remained almost frozen in time.

This oddity shop contains everything from antique tools to a human skeleton.