A towering relic of Upper Silesia’s industrial past, the blast furnace of Huta Pokój stands as a monumental reminder of the region’s former role as one of Central Europe’s most important iron and steel production centers.

Once overlooking the town, this church now resides on a permanent tilt.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

600 stumps, branches, and trunks of different shapes and sizes.

Heralded as one of the prettiest castles in all of Czechia.

A Cold War secret surveillance tower used to spy on radio communications.

The mystery of the Putim Ossuary involves a tricorn hat.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

Remnants of a cone-shaped Nazi bomb shelter.

This fortress was designed to prevent a Nazi invasion but was never used.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

It's said the devil used this mushroom rock as a table for a late-night meal.

After Nazi forces smashed this 4,000-year-old Neolithic standing stone, locals banded together to restore it.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

A rare cold-water geyser that bubbles to life every half hour.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

Despite its romantic name, this cross marks the site of a tragedy (and, incidentally, an ancient frontier)

Abandoned since 1998, this train station has become an oasis for urban explorers.

A beautiful maze marks where three countries meet.

The tallest mountain in mainland Netherlands isn't actually very tall.

A rare double mill nestled along the banks of the Aa river.

One of the largest burial mounds in the Netherlands and Belgium.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."