Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

The bones of two medieval royal lions were discovered at the historic fortress.

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

This medieval church tower has maintained its clockworks since the 16th century.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The bronze uniforms commemorate the vital role of women during World War II.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

These formal gardens were designed to be admired from the vantage point of the castle.

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

It's said this was once the home of King James V's pet lion.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

The main residence of the Erskine family and the hereditary keeper of the nearby royal Stirling Castle.

A distinctive building that incorporates a mythical beast into its architecture.

This figure of a local merchant is said to reanimate and do a dance during Hogmanay.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

A statue that stood at the center of a long copyright battle.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

A man has revenged his true love's betrayal through tears and stone genitalia.