Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

Sleep in a glass pod dangling off a cliff.

Huge stone depressions which may have acted as an Incan agricultural experiment.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

An ancient iron pillar in Delhi that seems to be rustproof.

Europe’s oldest natural human mummy.

Cold storage for agricultural biodiversity.

The largest stone moai on Rapa Nui.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Famously misunderstood wonder of the ancient world

Humble beginnings for one of the world's most famous scientists.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

This ancient Egyptian obelisk still bears the wounds of World War I.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

An architectural oddity hides in plain sight on this iconic London bridge.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.