A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.

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

The world’s oldest surviving single-arch railway bridge.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A museum pays tribute to the glass-making industry of Sunderland.

Locals affectionately dubbed this World War I memorial "Tommy."

Public art now takes pride of place on the site of one of County Durham's last deep coal mines.

The train that took the prime minister on his final journey now rests in a British museum.

A monument with a strange legend involving a horse's tongue.

An unusual stone chair can be found on the banks of the River Wear, not far from Durham Cathedral.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

An abandoned tower once used to study the cosmos hides within a thicket of greenery.

The most loyal of little dogs, or a Victorian era publicity stunt?

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A sweet symbol marks the place where torturous executions were once carried out.

The name of this suspended sculpture is Latin for "high horse," which is exactly what it is.

This sculpture of Edward of Woodstock is surrounded by eight Victorian lamp bearers.

One of three sites in England that house the National Collection of Arms and Armour.

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

A century-old tradition has culminated in a small but singular collection of feline effigies.

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

Follow the original medieval paths that wind through this intriguing section of the city.