A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

This was once the center of the Birdman cult, and is now a World Heritage Site.

These Nubian pyramids are strange and unique, even by pyramid standards.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

The palace of the King of Kings, burned by Alexander the Great.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

The grounds of this former dairy hacienda now contain an entire town inspired by Tuscany, Italy.

A 16th-century horror show built in a lovely Italian garden.

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

Water and windows define this defensive Italian well.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

A series of carved figures that scandalized British society.

These ornate arches show how the course of the River Thames has changed.

Hidden beneath the streets of London is a secret subway that only carried mail.

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

A tribute to the couples who brave long periods of separation during wartime.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.