Every equinox this Maya pyramid puts on a spooky ancient light show.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

The solemn exterior conceals an opulent interior of this 17th century church.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The Habsburgs' royal collections of art and wonders.

Baroque celebration of the end of the Great Plague of Vienna.

A spherical "micro-nation" in the heart of Vienna.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Handsomely crafted representations of our round planet.

The beautiful baroque library of the Hapsburg empire.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Ride the subways of yesteryear.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A surreal statue honoring Prague's favorite literary son.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.