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

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

An oasis of calm, nestled in the English countryside.

Three columns of volcanic rock shoot out of the ocean.

Stroll through a wonderland of stupendous moss-covered trees.

A Hungarian pharmacy museum with a box full of mummy powder.

A museum in the childhood house of a medical pioneer.

Museum dedicated to the terror regimes of Hungary.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Rare recess caves fill this unbelievably beautiful Ohio park.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

Iran's colorful terraces are a rare geological masterpiece.

This cascade of mineral-rich hot springs and waterfalls is an oasis in the Jordanian desert.

Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Like Mars, but much closer.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.