This historic black and white monastery is one of Bulgaria's architectural jewels.

The ancient latrines of the Greeks, in all their public glory.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

This historic observatory was established to keep shipwrecks from littering the Cape of Good Hope.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

An endless sea of white conical domes.

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

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

The highest point in Washington state is a volcano covered in glaciers.

A beautiful geyser under environmental threat.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

New fungal and bacterial species call this deadly lake home.

An entire town preserved as a historic landmark.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Tubing through a cave lit with glowworms is a magical underground experience.

Ruins of a German Castle on top of a towering stone pillar.

A curious collection dedicated to human and animal anatomy and pathology.

The ancient tomb acts as a calendar that keeps perfect time.

Famously misunderstood wonder of the ancient world

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