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

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.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A microbiologist-chef is slinging noodles with hyperlocal Nordic ingredients.

A church of bones, decorated with 40,000 human skeletons.

An enormous and lavish Gothic church in Czechia.

Countless grotesque faces stare out from this eerie Prague art wall.

A surreal statue honoring Prague's favorite literary son.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Cozy basement bar sports an inventory of over 2,000 beers.

Drink among marionettes at this pub inside a historic puppet theater.

A little sculpture with a large wardrobe.

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 valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

This stunning concert hall has become a symbol of Iceland's national recovery.

An encyclopedic collection of mammal penises.

Iceland's tribute to its thankless civil servants.

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

A monument to the defenders of the Arctic in Murmansk, Russia.