A remote horde of architectural treasures fit for Indiana Jones.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Bizarre Cavern.

An eerie, decaying ghost town destined to fade into the forest.

Valletta’s outdoor theatre stands within the ruins of a 19th-century opera house.

These temples are among the oldest free-standing stone buildings in the world.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

This subterranean necropolis holds three floors of antler-dug grave caves.

A staircase made of gravestones leads up to this church built into a giant rock.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

The only ancient site that remains on the south bank of the sacred Ilissos river.

One of the best-preserved medieval streets in Europe.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The hallucinogenic center of the ancient world.

At this concrete bunker on the Trondheim fjord, secrets lie above and below the water's surface.

Remote and wild, Kinnarodden is the northernmost point of mainland Europe.

A stunning architectural yet functional feat, towering over Oslo.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.