Architectureal fantasy quarter of Rome.

Breathtaking and huge 430 year old maps of Italy.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Erotic art covers the walls of the largest ancient pleasure palace.

Southern Italy's spinning top village.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

A former major munitions plant that has been converted into a sprawling art space.

Home to items never before seen by the public.

3,000 market stands in five former Zeppelin hangars.

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

Flamboyant architecture from the turn of 20th century.

The Guardian of Tallinn.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Macabre astrological automaton clock dating to the late 1400s.

Home to more than 13,000 pieces of war memorabilia and military equipment.

This eagle-topped spire remembers the military commander who snatched up California for the United States.