The largest known medieval map of the world.

A bench and a bridge pay tribute to Birmingham's favorite heavy metal band.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This fountain was designed to honor the man who helped bring water to Barcelona.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

The bizarre headgear looks like it was made for a fool, not a king.

Since 1995, two red-painted metal figures have guarded the entrance to the Northern Ballet.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

Wandering this ancient burial place offers a glimpse of the afterlife in the fresco-adorned tombs of an ancient Etruscan civilization.

Largest necropolis in the Mediterranean.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This curious, round temple is the oldest still-standing marble building in Rome.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.