This colonial fort is an intriguing example of Renaissance military architecture.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

This 7th-century monastery was sacked by Saladin.

The largest known Ancient Egyptian obelisk.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

An endless sea of white conical domes.

Ozymandias’ time-keeping temple.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

The famous winding walk at Chartres is surrounded in mystery and myth.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

France's most famous cemetery, with some of its most curious tombs.

A little sculpture with a large wardrobe.