This ancient structure is widely thought to be the oldest intact pyramid in the world.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

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.

The largest known Ancient Egyptian obelisk.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

Ozymandias’ time-keeping temple.

This local celebrity earned his fame by doing a job no one else dared.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The commemorative stone column conceals a secret laboratory.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Rebuilt remains of a temple to Roman god Mithras.

One part local history, 99 parts gruesome haunted house.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

This natural wonder is disappearing at an alarming rate.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.