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

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

The final resting place of soldiers' loyal canine companions.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Hear the quietest sound from across the dome.

A contemporary art installation housed within a Gothic cathedral.

The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Roman ruins top white travertine terraces formed by ancient hot springs.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

Be on the lookout for the symbolic insect all over the city.

Have a seat with the father of modern computing at this Manchester monument.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

This former lifeboat house now used by a funeral service was the site of a 19th-century boating tragedy.

A typographic tribute to the many comedic greats who make Great Britain laugh.

One of the oldest amusement rides in existence was a huge disappointment to its creator.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

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

Inside this chapel, Victorian jailers took the separate system to new levels.

The charming collection illustrates life in Lincolnshire in the 18th through 20th centuries.

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

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

This century-old cinema is complete with musical interludes and boasts a rare projection system.