Abandoned bull fighting ring, slowly falling apart in Uruguay.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

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

On a secluded beach is one of the few shipwrecks left on the shores of Mauritania.

The largest camel market in West Africa

An architectural relic that survived the hands of time.

Thousands of colorful pirogues showcase ingenious craftsmanship at the largest fishermen port in Nouakchott.

The quaint gallery displays works by artists from all across Mauritania.

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

A geological bull's-eye visible from outer space.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

A cemetery with goat-horn bedecked gravestones.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

This small shrine is dedicated to the designer of the first Russian fighter jet and his brother, who became Chairman of the Presidium of the Supreme Soviet.

A quirky house created entirely out of glass bottles combines a collector's spirit with an artist's flair.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

You'll find just about anything in this funky Tbilisi flea market.

The charmingly disheveled clock tower of Tbilisi's puppet theater.