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

What looks like missing grout is actually an old pub's peephole.

The adorable animals return to this nature reserve every fall to give birth to their pups.

Modern commuters still pass through this 2,000-year-old Roman archway.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

The oldest of the three remaining bridges in England with buildings on top of them.

This medieval castle is filled with an eccentric collection that ranges from ancient Egyptian artifacts to taxidermy to a mummified hand that was cut off during a duel.

One of England's most famous churches hides a pair of little known architectural treasures.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

Discovered on a shipwreck after more than 400 years, this Renaissance ratter tells a very waggly tale.

The Last Home of an Executed King.

Famously misunderstood wonder of the ancient world

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

England's largest white horse isn't even white.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

This Roman archeological site is hidden amid a 1930s housing estate.

This temple was constructed entirely by Roman soldiers.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

These remarkable cascades are the jewels of Upper Tees.

This memorial depicts the unlikely team that won England the Sir Thomas Lipton Trophy.

An iconic waterwheel in the Pennine Hills marks the location of one of Britain’s most profitable lead mines.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.