This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

The "Heroine of Dunkirk" rescued over 7,000 Allied troops during the historic World War II evacuation.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This one-time health resort was used by aristocrats around the world.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This medieval church is the only one in the world that features all Marc Chagall stained-glass windows.

Horsemen once used this tilting post during jousting practice.

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

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

Eat the ultimate iteration of Portugal's most beloved pastry.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

This charming candle shop has been in business since 1789.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.