This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

These little castles each held thousands of pigeons.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

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

This vast, water-filled underground labyrinth can only be toured by boat.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

Iran's colorful terraces are a rare geological masterpiece.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The palace of the King of Kings, burned by Alexander the Great.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

Named for the biblical warrior, the largest castle in Israel actually dates to the Middle Ages.

Idol made by King Jeroboam for the Israelites.

This synagogue is covered in beautiful mosaics that explore the history of the Jewish people.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

An iconic view point of the Sea of Galilee offers a look into Israel's past.

A secluded fortress from the days of the Crusades that offers breathtaking views.

This ancient tomb in the West Bank is a holy site for Jews, Muslims, and Christians alike.

Deep in the Negev Desert, the world's tallest solar tower looks like a sight straight out of science fiction.

The abandoned shell of what would have been the Jordanian royal family's summer palace.

Located within one of Israel's most picturesque monasteries is also the country's first meteorological research station.

This historic rec center in the heart of Israel is a bastion of peace and togetherness.