Colorado's oldest church is now home to the largest handmade adobe labyrinth in the world.

You can dig up your own crystals in the quartz capital of the world.

This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

Famed activist Hellen Keller was involved in the operation and administration of this vacation home for blind women starting in the early 20th century.

Featuring a Loretta Lynn display and a re-created coal mine exhibit.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

The original location of Vollis Simpson’s Whirligigs.

The tallest waterfall in West Virginia.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

Hike, ski, or snowshoe to a backcountry yurt that serves up gourmet, four-course dinners.

Admire impressively detailed models of everything from a Pennsylvania Dutch kitchen to the world's smallest Swiss Army Knife.

A wondrously macabre treasury of obscure antiques and unusual oddities.

Step back in time at this historic variety store, packed with items from a bygone era.

This unusual island has a winding sand bridge that only appears at low tide.

On a corner of the Ardmeanach peninsula on the Isle of Mull, a 50 million-year-old fossil tree hides in the coastal cliffs.

This shrine commemorates the site of the first known Catholic mass in the United States.

This museum was once the home of industry titan Matilda Dodge Wilson.

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

Abandoned station along an ancient pilgrimage route.

A metal skywalk leads to the top of this striking granite outcrop in Porongurup National Park.

One of the few slot canyons in New Mexico, this area is fantastic for hiking, camping, and stargazing.

Considered "the most original, complete, and unimproved" circles in Aberdeenshire.

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

The last remaining location of a drive-up hot dog stand named after a local pool shark.