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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

One of downtown Berlin's last reminders of its Communist past.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

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

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

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

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

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

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

The world's oldest bookshop still in operation.

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

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Catacombs turned marketplace.

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.