An ancient city exhumed from the depths of the ocean.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Malaysian fireflies create a dazzling display as thousands light up in unison.

The largest single concentration of harmless garter snakes in the world is a writhing Canadian serpent orgy.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

A mysterious taxidermy man-beast of the seven seas.

An isolated dive site teeming with cnidarians.

This golden temple is surrounded by hundreds of stone tablets that comprise the "world's largest book."

Surreal riveted sea forts once protected the Kent shores from German attack.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

A spherical "micro-nation" in the heart of Vienna.

A visionary precursor to the Internet made of index cards.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

One man's artistic vision is a small town government's legal battle.

A self-built castle made by a mysterious man.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

Retirement home for giant obsolete machines.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

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

Secret Soviet city once home to Russian cosmonauts and space training facilities.