Legend says train robbers stashed their gold within the depths of this unusual cave.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

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

Home of the International Space Hall of Fame.

This is one really big nut.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

One of the largest ancient geoglyphs in the world is a tall desert god used for predicting the weather.

A sulfuric martian landscape that looks far better than it smells.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

A Mars simulation in the southern Utah desert.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The largest geyser field in the southern hemisphere is a spectacular sight.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

A small sculpture garden that provides a microcosmic representation of California.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The magic's in the hole!

San Francisco's newly reopened hands-on science museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A museum dedicated to the history and exploration of both popular music and science fiction.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.