The world's largest reflecting pool is just two centimeters deep.

Thousands of well-dressed mummies below a monastery.

The world's most active stratovolcano is almost always erupting.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

Protecting the dead from opportunistic body snatchers.

The most loyal of little dogs, or a Victorian era publicity stunt?

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Single runway interrupted by a busy road that cuts across its middle.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

A "miracle" that seems to produce more holy fistfights than holy revelations.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Pilgrimage site for star-crossed lovers.