The warmest cave in the Ozarks features two seemingly bottomless lakes.

Considered by many to be one of the most dangerous highways in Alaska.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Internationally recognized group that works to protect the wolf and educate the public about its plight.

Colorful boxes placed over the dead are left to rot and crumble.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Four-story concrete hotel never opened to customers.

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

This hidden gem in Arizona is truly worth the rugged journey.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

The oldest operating picture gardens in the world.

The half-finished remains of what would have been Scotland’s biggest piece of landscape art.

Along the Outback Scenic Byway, adjacent to hot springs, this human-made geothermal feature takes unexplained breaks.

A rare labyrinth-style path carved into a historic hill.

A giant ant model welcomes visitors to an exhibit about symbiotic organisms that live with army ant colonies.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

Everything in this two-story house—down to the mounted deer head on the wall—was carefully crafted from concrete.

The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

This set of hot springs also comes with fantastic views.

One of the only remaining vestiges of baseball's Negro Leagues in Atlanta.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

A unique post-modern public space in the middle of the Warehouse District in New Orleans.

A glimpse into the state's vibrant literary culture along with inspiring stories from an inclusive author community.