Go inside to really appreciate this 500-year-old technological masterpiece.

Commonly acknowledged as the only public monument to the Devil himself.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A public urinal so pretty, it was declared a national monument.

This emotive sculpture was originally created for the 1878 World's Fair.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

A typographic tribute to the many comedic greats who make Great Britain laugh.

Huge winged monument in the United Kingdom.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A New Zealand couple's shell-adorned home living room, now on display at the Canterbury Museum.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Eighty million natural history specimens call this gargantuan museum home.

A British plaque explains that a house was built using the spoils of the first international golf bet.

The artwork mysteriously appeared within an Edinburgh cemetery.

A stunning Victorian abbey and walled garden on a lakefront.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

This natural sea arch highlights Ireland's rugged coastal beauty.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.