A Christian-themed amusement park and complex rocked by scandals.

The world's largest bioluminescent area was undiscovered by science until 2005.

Once the path of a railway tunnel, now home to thousands of glowing insects.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The steel hull of a wrecked tug rests on Lobster Cove on Monhegan Island’s rocky southeastern shore.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

This vintage "streetcar boat" lay at the bottom of Lake Minnetonka until the 1980s.

The world's longest known cave system.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

The king of U.S. high points towers over every other peak on the continent.

Stroll through a wonderland of stupendous moss-covered trees.

The illuminated falls are a gem in North Cascades National Park.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

No Gordon Lightfoot song, only a barebones monument to greed.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Four hundred granite steps were built into this massive rock by the National Park Service.

Metro station with a claim to rock n' roll fame.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

An old train trestle re-imagined as an Egyptian obelisk.

A terrific purveyor of natural history objects and curios.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.