A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

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

The hidden lair of an alchemist rediscovered in a 2002 flood.

Looming communist pillar with a Czech twist.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

Submerged ruins of a Neolithic coastal settlement, where houses, wells, graves and skeletons have been unearthed.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The home of the Dead Sea Scrolls is an abstract modernist dream.

A saintly relic hidden in a Prague church basement.

The oldest garden in Prague, once part of an medieval orchard.

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

A series of playful yellow penguins share a serious message about the environment.

This automated sculpture of two men peeing will spell out text messages with their micturition.

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

A surreal statue honoring Prague's favorite literary son.

Macabre astrological automaton clock dating to the late 1400s.

The first museum in the world devoted to sexual gadgetry.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Step inside Lucy, the world's largest "elephant."

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.