Even King Tut was intrigued by the glass of the Great Sand Sea.

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

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

An abandoned outdoor movie theater in the Sinai desert.

An alien landscape of chalk-rock in the Egyptian desert.

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

An endless sea of white conical domes.

Ozymandias’ time-keeping temple.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

A self-taught astronomer fell in love with the stars and built his own observatory in Colombia.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

Colombia's biggest botanical garden contains plants from all across the country.

Known as the site of 'El Dorado,' this mysterious lake is rumored to hold gold beneath its waters.

This tiny shop has been serving traditional tamales for more than 200 years.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

This whimsical home made entirely from clay is basically a giant piece of pottery.

An ancient city hidden in the heart of the Sierra Nevada mountains.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

This picturesque mansion has gone from opulent ruin to nature museum.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.