A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This attraction was abandoned after the Chernobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Moss and stone turn this waterfall into an otherworldly liquid veil.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Geometry and mystery come together in an epic show of octagonal masonry.

The bridges portrayed on EU currency aren't fictional anymore.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

A sulfuric hellscape in southern Italy.

Southern Italy's spinning top village.

This abandoned Brutalist treehouse is a hidden architectural relic.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

A micronation on an islet along the coast of a Portuguese island.

A cluster of granite granaries perched on stilts.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.