An underground passage originally constructed as an air-raid shelter during the Spanish Civil War.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A cemetery in the Netherlands honors Soviet soldiers from World War II.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

A historic Christian shrine nestled within a spectacular natural cave.

Designed in the Romanesque style, this structure was once a fortress monastery.

Be it nature, art, or abandoned military architecture this eclectic German "museum" has you covered.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This residence straddles a border between Belgium and the Netherlands.

The abandoned club hides in the hills of Ibiza.

Thousands of bats stream out of caves every night on the edge on Thailand's second largest park.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Historic medieval fortified city in southwest France.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

This ghost town in Belgium will lose its street art when it ceases to exist.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Located inside Hoge Veluwe National Park, this museum began as the private collection of a prominent female art collector.

The gargoyles and grotesques of the 21st century are here—22 emoji built into a new building in the Netherlands.

At the base of this tower, a plaque marks the original center point of the Netherlands.

The ancient latrines of the Greeks, in all their public glory.