Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A beautifully eclectic mix of architectural styles.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

Regency-era excess on the English Coast.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Pop culture has helped to keep this iconic British building from being destroyed.

A 18th century graveyard and its astonishing cortege of macabre iconography.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

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

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

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

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

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

3,000 market stands in five former Zeppelin hangars.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.