A six-person chapel in the middle of Alberta's badlands.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

A forgotten monument to Yugoslavian freedom.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

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 truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Yugoslavia's biggest underground airport lies in ruins.

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

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A mysterious tunnel hidden in the shadows of a colorful, historic sanctuary.

Mysterious standing stone formations looks like a petrified forest.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

UNESCO-protected ancient burial ground.