At night, the enormous sculpture looks like a UFO hovering above the English hills.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A Milanese café entirely designed by the American director Wes Anderson.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A bright turquoise river cascades beautifully down stepped terraces in southern China.

A 300-foot-long Cold War submarine floats in a Chilean River as a maritime museum.

Military and first responders can test their skills in a Foggy Bottom mock station down in Georgia.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

One of the deepest indoor swimming pools in the world.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A modern-day Lascaux cave underneath Paris.