The caldera of this mini-volcano has been turned into a naturally heated mud bath.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

A great example of the inventive canal bridges that were deliberately split down the middle.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

One of Europe's oldest libraries.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

This 11th century tower is said to be the oldest building in Oxford.

Used as an example in one of the first dictionary entries for "museum" in 1706.

Home to the most complete dodo remains known - one head, and one foot.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

Built by King Norodom to honor his late father.

Hoax, mistake, or evidence of dinosaurs in human times?

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

Fowl, love and death in Vietnam.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.