Climb inside an iron crystal magnified 165 billion times its normal size.

When you're a great Russian Tsar, even your vomit gets a statue.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

An extraordinary mix of Phoenician, Roman, early Christian, and Byzantine ruins beautifully set overlooking the Mediterranean.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

A shrine of fire worship built on top of a natural flame.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

An archaeological site believed to be the burial place of the "mother of us all."

Site where Moses may have received the Ten Commandments.

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

World's oldest and largest space launch facility, once a secret missile testing site.

Rusting ships sit in a desert where a sea used to be.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

Derelict airplane bodies serve as both home and income for three Thai families.