Swedish skyscraper with a 90° twist.

A gothic church dedicated to the love of wine.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

A haunting deserted hotel is a favorite with artists and photographers.

This symbol of Polish heritage survived the occupation during World War II, hidden in plain sight.

This splendid tomb may look fantastic, but there's nothing in it...

Elevated freight railway turned wildly successful urban park.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A Museum of Psychiatry in a still-operating mental institution.

Christ's blood preserved in a Belgian town.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A beer pipeline runs beneath Bruges.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.