The little-known second castle that William the Conqueror built in York.

An incredibly well-preserved piece of ninth-century Viking poop.

The world's oldest bookshop still in operation.

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.

The best place in the world to buy tinned fish.

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

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

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

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

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

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

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

One of the windiest peaks in Crimea is home to an incredible set of cable bridges.

This magnificent Crimean estate was once a playground of the Russian elite.

A sweet symbol marks the place where torturous executions were once carried out.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A six-ton wedding present for the King of the Scots.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

One of the shortest streets in York has an especially odd name.

340-foot statue built to honour the Heroes of the Soviet Union.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.