A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Bacteria and algae give the salty water its bubblegum hue.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Week-long block party becomes a competition for the best decorated street.

An ancient Egyptian temple in the middle of Madrid, Spain.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Mountain where Jesus was first tempted by the Devil.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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.

This 500-year-old Tudor home is a treasure trove of history and mystery.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.

The only medieval bridge in Britain with its defensive tower still in tact.

Stroll through Welsh history in a village of reconstructed structures.

After years of slow decline, a derelict Gothic castle is now being restored to life.

The longest and tallest aqueduct in Britain can actually be sailed across.

The remains of centuries of copper mining appear like an alien landscape.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”