An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

High plateaus and beautiful waterfalls frame this ecologically significant nature preserve.

Winter roadtrips are a little more exciting on this seasonal, slippery expansion of Sweden's national highway system.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

A crystal clear beach surrounded by beautiful coral reefs.

Fine dining 20 feet below the surface in the Indian Ocean.

When you can't get to the Pacific, just go to Florida.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

The great Danube river starts here.

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

American soldiers discovered Europe's best one-liner at the end of World War II.

The world's largest collection of intentionally useless inventions.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Festival of Perpetual Life and Rebirth.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

A naturally beautiful, seemingly bottomless deep blue spring.

Ancient Greek oracle of the dead.