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

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.

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

An endless sea of white conical domes.

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

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

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

A strange aquarium with stuffed fish, and almost no water for them to swim in.

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

The once great capital of Egypt now crumbles forward as evocative ruins.

An ancient city exhumed from the depths of the ocean.

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

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

At the foot of an active volcano sits a church miraculously spared by its lava.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

This small group of sand dunes manages to pack in a strange rainbow of colors.

The falls were named for the mistaken idea that they were the ones pictured on the Canadian $5 bill.

This otherworldly French waterfall looks like its waters have turned to stone.

Since ancient times these picturesque springs have been providing bathers with healing waters.