Nature took her revenge on the "Wickedest City in the World."

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

An eccentric German artist built this weird and wondrous castle packed with shocking sculptures and alien art.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

Come for the springs; stay for the mud bath.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

A 220-foot deep watery drop-off, filled with marine life.

A sinkhole known simply as "The Hole."

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

A tropical rainforest designed to resemble a scene from the monumental film.

This tiny island in the South China Sea is crawling with venomous sea snakes.

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

This dangerous-looking suspension bridge may have been too unstable to remain open.

The largest tea plantation in Southeast Asia supplies gorgeous vistas alongside tea for the surrounding countries.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

Designed to serve primarily the Maharaja, this is an interesting variation on the traditional stepped well.

An ice field known for harboring an infamous Martian meteorite turned out to contain the oldest air on Earth.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

A white Buddhist temple with a golden restroom.