A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A naturally beautiful, seemingly bottomless deep blue spring.

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

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

This one-time health resort was used by aristocrats around the world.

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

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Ancient stone dildos and other odd pieces of medical history are displayed at this quirky Cyprus gem.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

When you're a great Russian Tsar, even your vomit gets a statue.

This ghost town in Belgium will lose its street art when it ceases to exist.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

The first designer power line in Estonia.

The widest natural waterfall in Estonia is a sight to see in all seasons.

This Estonian watchtower looks like a big tree with two giant bird nests on it, complete with a "golden egg."

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.