The deadliest diving spot in the world is also a stunning geological marvel.

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

Brightly painted boulders scattered throughout the Sinai Desert.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

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

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

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

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

An endless sea of white conical domes.

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

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

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

Ozymandias’ time-keeping temple.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

This space-age looking obelisk rises over a city in the rainforest, meant to resemble the local castaña tree.

Thousands of volcanic rocks carved 1,000 years ago.

The outside of this exposed Moche pyramid is covered with striking colorful adobe friezes.

It took 82 years and four different plaques to finally get the story right.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This high-Andean reserve protects the graceful vicuña that was nearly hunted to extinction for its precious wool.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

This set of mysterious petroglyphs in the Peruvian jungle could shed light on centuries-old activities in the region.

This small oxbow lake has rare giant river otters and some Seussian-sounding birds.