The world's most elegant power lines.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

A Spanish town built into the cliffs.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

The earliest known map to show America, discovered by accident at a Paris bookshop.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

The remains of this misplaced church were moved here stone by stone.

A pair of gigantic baby heads greet passengers at Atocha Station.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

These red marks, seemingly placed at random, are in fact not.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Hundreds of hidden passageways weave through the old quarters of Lyon.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Abbey built on the ruins of Roman catacombs.

Poseidon? No one seems to know.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.