A series of playful yellow penguins share a serious message about the environment.

Macabre astrological automaton clock dating to the late 1400s.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This monumental work of art symbolizes the coming together of a previously divided city.

A Reformation-era fiery figurehead once denoted this location as a print shop.

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

Banksy's image of a naked man dangling from the window of a sex health clinic.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

Go back 50 years with a turn on one of the park's carefully restored vintage fairground rides.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

This eclectic antique shop is home to the taxidermy remains of a celebrity lion named Simba.

This aircraft museum is home to one of just three Halifax bombers in the world.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

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

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

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

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