Legend says this sacred tree was a gift from goddess Athena.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

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

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

One of the best-preserved medieval streets in Europe.

"Medieval" castle built in the mid-20th century by one family.

The most powerful waterfall in all of Europe.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

The whiskey producer's archives includes a historical list of infractions committed by and associated penalties exacted upon employees.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A hugely vast Irish landscape of barren rock that stretches for miles.

For more than two centuries, this family-run establishment has been serving up some of Ireland's best oysters.

A stunning Victorian abbey and walled garden on a lakefront.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

Launch site for nuclear war against Western Europe.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.