This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This neon sign is an homage to an Alfred Hitchcock film.

The final resting place of a poisoned lover whose death was at the center of one of Glasgow's most sensational murder trials.

This hidden gem reveals the history of Britain's first police force.

Another entry into the world of Edinburgh's pop-up artworks.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

This sculpture of disembodied body parts forms a poignant memory of the horrors of World War II.

A book bound in the skin of an infamous criminal, along with countless other specimens.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Berlin's old airport.

Cold war icon and onetime "hole" in the iron curtain.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This watchtower once presided over the Berlin Wall.

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

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

This monument dedicated to the legendary American showman can be found in Scotland's largest city.

The former home of the world-famous Templeton Carpet Factory.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital

A leafy, peaceful oasis nestled in the heart of Glasgow's busy south side.

These rusting, skeletal structures are monolithic monuments to Glasgow's industrial past

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.