Amsterdam's Red Light District leaves little to the imagination.

This unusual elevator doesn’t stop or slow down.

A unique collection of gilded age mechanical pianos.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

One of only three fountains created by the iconic architect Friedensreich Hundertwasser.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

A 2,000-year-old wine press hidden in an overlooked park in Tel Aviv.

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

A naturally beautiful, seemingly bottomless deep blue spring.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Space-age monument to an early 20th-century uprising.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

What happens when you cross a mayor and a painter?

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

The world's first interactive human body museum also serves as a chair for a giant orange man.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

The world's only museum devoted to the wonders of fluorescence.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

A cableway for car transport.