One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

A unique museum dedicated to culture and artistry of carpet weaving.

The reconstruction of this prominent building fulfilled a long-written command.

The oldest residential street in Europe also features an optical illusion.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

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

A swath of France so devastated by war it is still forbidden to go there.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

The little-known second castle that William the Conqueror built in York.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The walls and streets of the ancient city are peppered with penises.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.