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

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

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

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

A century-old tradition has culminated in a small but singular collection of feline effigies.

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

An iconic waterwheel in the Pennine Hills marks the location of one of Britain’s most profitable lead mines.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Pop culture has helped to keep this iconic British building from being destroyed.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

A former imperial sea-fortress and Soviet prison.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

"There's nothing there," and other lies the KGB told us.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This tiny island is home to the world's largest colony of Northern gannets.

Journey through one of the oldest industrial sites in Scotland.