Figures of unknown origin carved into the surfaces of underground caves.

A store that sells all manner of bones, insects, and animal curiosities.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

An eatery for UFO seekers on the Extraterrestrial Highway.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Even King Tut was intrigued by the glass of the Great Sand Sea.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The ship that got left behind.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

This lab's maddening silence is good for business but bad for sanity.

A remarkable geological formation resembling a forest made of stone.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

Cryptic messages embedded in the New York City sidewalk.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Try not to get slimed in Tribeca.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

An abused and forgotten metropolis, abandoned for centuries.

Paris' linguistic guide to the international language of, yes, love.