Portugal's National Pantheon has a history of curses, collapses and financial problems.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The world's oldest bookshop still in operation.

This memorial park is also the original site of Queen Cleopatra’s Caesareum, whose pillars now stand in London and New York.

Underneath the Serapeum ruins lies a dark passage with nooks for books, the lesser-known “sister” to the famous ancient library.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

Part shoe store, part sociopolitical art gallery, part zoo.

Ancient Egyptian relief, claimed to depict an electrical light.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

Modest but unique pyramid built for a pharaoh has been reduced to a “heap of stone.”

This eatery is emblematic of the connection between Jamaica and Nubia.

This 7th-century monastery was sacked by Saladin.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Located near Cairo's El Korba district, the abandoned mansion continues to inspire mystery and rumor throughout the city.

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

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

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

In Egypt's expanding metro area, many of the neighbors are dead.

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

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