One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Turntable anonymously received orphans, alms, and groceries.

This cemetery features modernist statues as strange as its name.

This Funeral Hearse Museum represents the finest in cadaver transportation.

An isolated village literally built into the crevices and rock formations of a mountain.

A modernist church in an ancient village.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

A passage grave used in neolithic rituals.

The first island in the world designated a light-pollution-free astronomical observation point.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

A remarkably intact castle that once was the largest in Ireland.

In ancient times, these fallen standing stones supported a massive house.

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

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

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

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A former plague hospital turned medical museum.

The ancient latrines of the Greeks, in all their public glory.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.