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

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The fairy tale castle of the "fairy-tale king."

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The place where World War I began.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

Bridge that died in war and was resurected.

Just a few miles from Novalja, a strange geological oddity has left scientists baffled.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

Dive for drinks at Croatia's first and only underwater winery.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

The remains of a sunken military ship wreck visible through clear water.

Legend has it fairies gathered at the site of this medieval castle.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

An ethereal glowing blue ocean cave in Croatia.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

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

This graffitied 19th-century building was a prototype of European industrial architecture.