The atmospheric road was never meant to be so creepy.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A fascinating insight into daily life in the Eastern Bloc.

One of downtown Berlin's last reminders of its Communist past.

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

An abused and forgotten metropolis, abandoned for centuries.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

A former fortified tower now houses a collection of classic communications equipment.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Ancient serpentine sacrifice holder that has stood the test of time.

A marvel of Byzantine engineering under the streets of Istanbul.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.