An ethereal glowing blue ocean cave in Croatia.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Carefully reconstructed after the Bosnian War, this 16th-century bridge stands as a symbol of the country's enduring multicultural heritage.

Bridge that died in war and was resurected.

This ancient Roman aqueduct once funneled water to Diocletian's palace.

One of the very few mosques built by the Ottomans still standing in Croatia is now a Catholic church.

Split's smallest church, and one of its oldest, has been reconstructed inside the city's Roman walls.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The local club's soccer field is practically surrounded by UNESCO-protected monuments.

This pedestrian bridge in Croatia is a sleek, ship-inspired design with a fun net and social spaces.

The interior of this church has been turned into a memorial to locals who died in Croatia's Homeland War.

Legend holds that this knife serves as a chilling reminder of the deadly rivalry between two local builder brothers.

Remnants from a time before electricity.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Inside this Krakow church, an explosion of psychedelic color.

Krakow's own version of the Hollywood Walk of Fame.

Seven dragon statues—including one that breathes real fire—are scattered throughout the streets of Krakow.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.