A beach made of semi-precious green sand on the Big Island of Hawai'i.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A quirky house created entirely out of glass bottles combines a collector's spirit with an artist's flair.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Enormous underground chamber built to detect 'ghost particles' of the universe.

An unconventional space for art and science housed in a massive old warehouse.

Featuring Zürich's only authentic 14th-century plague doctor's uniform!

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Thousands of costumed dolls fill one of the world's creepiest museums.

Avant garde house of Pierre Cardin on the Cote d’Azur.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

A New England curiosity cabinet, one hundred years on.

Where the polar bear watches over everything, and every drink is a double.

A fifth-century temple improbably built into the side of a cliff.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Specimens collected by the author of "Lolita" and self-taught lepidopterist are exhibited in his childhood home.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

270 million year-old forest of stone.

Hunting trophies decorate Oregon's most unique bar-restaurant.

A natural arch offers panoramic views of Yangshuo's karst hills.