The site of murders and Satanic cult gatherings.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

This historic national park is covered in the stunning ruins of red rock pueblos.

A mysterious spirit totem at the edge of Navajo lands.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Rippling sand dunes frozen in the Arizona rock.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

World's largest collection of serial killer artwork and other macabre exhibits.