Flamboyant architecture from the turn of 20th century.

A black cat protests the City Guild in Riga's Old Town.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

3,000 market stands in five former Zeppelin hangars.

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

A subterranean house of worship carved right out of the bedrock.

A marvel of Byzantine engineering under the streets of Istanbul.

A fountain standing as a testament to a doomed alliance.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Ancient serpentine sacrifice holder that has stood the test of time.

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

Where commuters walk through remnants of an ancient Greek necropolis.

A blooming house of worship for the masses.

The quiet field that inspired one of the most famous songs of all time.

The Liverpool street made famous by the Beatles is real.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

Pyramid shaped monument with a tall tale attached.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

Since ancient times these picturesque springs have been providing bathers with healing waters.

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

Ruins of a German Castle on top of a towering stone pillar.

An collection of Chinese propaganda posters from 1949 to 1979.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

A restaurant and observation deck built in a unique broadcasting antenna.