A monument in the Belarusian city of Polotsk claims to mark the exact midpoint of the European continent.

This deceptively beautiful island was once home to a German concentration camp and known as "Death Island."

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

A lush indoor jungle fills this bustling Madrid transportation hub.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

You can row a boat through this ancient underground reservoir.

These gnarly desert trees produce the prized aromatic resin traded along the ancient incense trail.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

Rare recess caves fill this unbelievably beautiful Ohio park.

This Central New York ghost town was once a prosperous railroad community.

Ten shipwreck-shaped chalets lie along the sand dunes on Namibia’s Skeleton Coast.

Legend says this rock was once a chopping block for public executions.

This spectacular mosque houses the second-largest chandelier in the world.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

Just saying the name of this town out loud is said to bring bad luck.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.