A walk through the historic city center, under the streets of Seattle.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

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.

Ancient Egyptian relief, claimed to depict an electrical light.

One of the most well-preserved temples of ancient Egypt.

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

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

The original goat tower, the one that started it all.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

Largest cave system in Africa.

The world's largest impact crater is mainly eroded but still remembers the planet's violent history.

A mesmerizing sculpture marks the site where the activist was arrested after evading capture for 17 months.

Local lore says a serpent-like beast lurks in the deep basin below the falls.