Built in the 16th century, the tower is now in ruins.

A remarkable feat of Victorian engineering across the Firth of Forth.

The oldest natural aquarium in the United Kingdom.

A public art piece that barely gets recognized, but then that might be the point.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

It's home to the taxidermy remains of Peter, the dog who helped convict a murderer.

This airport currywurst stand is made out of retro airplane parts.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The only surviving piece of Copenhagen's 16th-century defensive wall.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Hidden beneath the streets of London is a secret subway that only carried mail.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

A Neolithic burial site built 1,000 years before Stonehenge.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Two plaques commemorate the site of Shakespeare's first theatre.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

The medieval woodcut-style artwork chronicles life in medieval London.

The pockmarks across the building's facade are remnants of the Blitz.

Now a memorial to merchant sailors and Titanic victims, this medieval church was destroyed by bombing raids in 1940.