The fire inside this temple has burned for more than 1,500 years.

17th century mosque for Shah Abbas' harem.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

One of the largest and oldest caravansaries in Persia.

These little castles each held thousands of pigeons.

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

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

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

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

The celebrated eyesore created by starry-eyed sweethearts.

Auguste Maïcon, a pioneer in French aviation, was born in this house in 1891.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

A medieval church built into an ancient cave.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

A place to see how French aristocrats lived in the early 1900s.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

A huge Megalithic chamber tomb located behind a cafe.

Perfume museum and library.

Claude Monet was baptized in this lavishly ornate Paris church.

France's high-tech, future-themed amusement park.