The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Charles Babbage's proto-computer, painstakingly brought to life.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

London's old-school healing garden.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Hear the quietest sound from across the dome.

An unusual round church in London with a Templar past.

Artists have long been drawn to these atmospheric 12th-century ruins.

The bizarre headgear looks like it was made for a fool, not a king.

These ancient ruins were the final resting place of King Henry II's mistress.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

England's only square-dimension hill horse was built to celebrate Queen Victoria's coronation.

Europe's largest prehistoric mound – burial site of a legendary king?

The first archaeological site discovered by aerial photography.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

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

Famously misunderstood wonder of the ancient world

A 15th-century former coaching inn forms the implausibly grand entrance to a 1980s shopping mall.