Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

A geological oddity topped with a 2,000-year-old pagan temple.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

A friendly pub with a sordid past in cock fighting.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

Sweden's "good old days" painstakingly re-created in a model village.

Sweden's oldest animated sign is still lighting up the skyline today.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

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

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Macabre astrological automaton clock dating to the late 1400s.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

Steadily reminding Czechia of its past.