Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A terrific purveyor of natural history objects and curios.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The "dragon babies" of southeastern Europe.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

This ancient theater was once the home of fierce gladiatorial battles.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

A contemporary fresco movement illustrates the region's rich history.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Be(w)ar(e) the moat around this historic Czech castle.

A surreal statue honoring Prague's favorite literary son.