Stunning Roman aqueduct used for 1900 years and still standing.

This memorial to the thousands of Indian dead during WWI was callously used for target practice during WWII.

A music-filled, booze-soaked oasis in the desert.

The silly symbol for an underground protest group is now scattered around the city.

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

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A fake town founded by Western movie stars is now becoming a hip desert community.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Recently restored menagerie of Victorian-era beasts.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

Giant, friendly pelicans in Central London, the most unlikely of places.

Human-made caves excavated to hide a secret society of wealthy pagans.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

One of the oldest amusement rides in existence was a huge disappointment to its creator.

One of the ghostly stops along Route 66.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.