Nature and art meet in this curvy creation

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

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

The mayor made the declaration in 2004.

It was once used as a classroom to teach mining skills to local high school students.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

One woman's dream became a train hotel in her backyard.

A historic freight system that found the true gold rush is in tourism.

Gorgeous cave resemble a winter wonderland.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

A hiking area billed as a possible home to Bigfoot.

Cascading outward, this waterfall creates the appearance of a flowing veil.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

Seattle’s Whimsical Mural Master.

A nondescript Seattle restaurant inherited a piece of European history.

A giant Troll lurks under one of Seattle's oldest bridges.

A walk through the historic city center, under the streets of Seattle.

Remnants of a forgotten 1920s speakeasy and Prohibition-era murals were discovered in its basement.