These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

After public executions took place at this location, attendants would also attend a local horse race.

This popular square's history as the former site of a church is right beneath your feet.

A Reformation-era fiery figurehead once denoted this location as a print shop.

When the plague struck York, this stone was used to leave supplies for the sick.

The final resting place of England's most notorious bandit.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

This network of narrow, medieval passages has the most delightful name.

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

Two minuscule windows are tucked inside this medieval building.

This original castle in Kendal is 1,000 years old.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

An unusual artwork dedicated to a unique man that entertained people visiting Cambridge while raising money for charity.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

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

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

The broken skateboards that became a poignant memorial to a murdered skater.

These ornate arches show how the course of the River Thames has changed.

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

The Tudor-style cottage in the middle of the square is not quite what it seems.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This Underground station has been a popular filming location for decades, even before it closed.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.