The partially submerged ruins of a white marble quarry used in ancient Greece for over 1,200 years.

Temple complex that once housed the famous statue of Nike.

Northern Ireland's Brobdingnagian stepping stones.

A stunning Victorian abbey and walled garden on a lakefront.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

Longest fortress system anywhere in Europe.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This micro-nation may be some sort of prank, but its constitution sure seems official.

A narrow strip of land is home to the tallest migrating dunes in Europe.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The silly symbol for an underground protest group is now scattered around the city.

These small, triangular, colorful houses are a staple of Madeira Island.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

A micronation on an islet along the coast of a Portuguese island.