The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Cold war icon and onetime "hole" in the iron curtain.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Rusty red sands line the shores of this Canadian Province.

Little island known for its massive beachfront "flowerpot" pillars.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

A mysterious spot where the laws of gravity seem not to apply.

Iconic rock formations that allow for exploration during high or low tide.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A massive Celtic cross secretly growing in an Irish forest.

Experience what life was like in Ireland during the Viking and medieval ages.

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

This small monument marks the divide between the Atlantic and Indian Oceans at the southernmost tip of Africa.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.