This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

The only Bahá'í house of worship in North America and one of only a handful worldwide.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

An Art Nouveau building covered in animal gargoyles and grotesques.

A subterranean Holocaust refuge within one of the world's longest cave systems.

This attraction was abandoned after the Chernobyl disaster.

The largest catacomb system in the world.

The fences outside some of South London's estates are made from recycled World War II stretchers.

Shop of curiosities with a dinosaur museum tucked in its basement.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

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

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A statue of the original Pearly King is hidden in a church's crypt.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.