Yale University's home for rare works, including the mysterious Voynich Manuscript.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The most visited, and possibly most controversial, museum in Germany.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Explore 10 acres of environmental sculptures.

A modern day curiosity cabinet.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Odd outsider art installations surround a Gold Rush-era ghost town.

Enormous lake at the bottom of a unique cave system.

A hand-built folk art installation covered with messages of God's love.

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

The ghostly remains of an accidental sea.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

From the Difference Engine to the Cray-1, all under one roof.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

The once highest point in China blends symbolic design with a kick of adrenaline.

A beautiful bamboo trail tucked in this famous Japanese shrine.