It's believed that these columns marked the end of the Via Appia.

This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

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

The reconstruction of this prominent building fulfilled a long-written command.

The oldest housing complex in Riga is a mini timeline of architectural trends.

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

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

The mile-long pier stretches from a ruined fortress out into the Baltic.

Guests become prisoners on a visit to Latvian prison.

These crumbling Latvian forts make for some haunting seaside ruins.

There are no crying babies in this neck of the woods.

This castle ruin in the middle of nowhere is a gem for wildlife enthusiasts.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This early version of the guillotine was used to execute the man responsible for its construction.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The broken skateboards that became a poignant memorial to a murdered skater.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

This dockworkers' lunch joint has been left leaning by a century of storm floods.