The remains of a convent turned military barrack in the heart of Madrid.

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

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

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

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This bookstore serves recipes from the cookbooks on sale.

A little slice of Japan and its aesthetics in London's Holland Park.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

London's smallest police station is barely the size of a phone booth.

This coffee shop lies hidden beneath a historic church.

142 ceramic steps become a mosaic once a year.

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

The sunlight passing through the opening of this huge cave system creates a magical effect.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Inside this Krakow church, an explosion of psychedelic color.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

Medicinal spa created with the discharge from a geothermal energy plant.