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

Mountain where Jesus was first tempted by the Devil.

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.

An eerie collection of the surviving structures from a past celebration of the future.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

The pockmarks across the building's facade are remnants of the Blitz.

The bronze uniforms commemorate the vital role of women during World War II.

A mysterious shape catches the eye in this 16th-century painting.

A measuring mishap led to these artificial stone ladies losing their stomachs.

The commemorative stone column conceals a secret laboratory.

An architectural oddity hides in plain sight on this iconic London bridge.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Ship-sized kinetic sculptural fantasy.