An abandoned cable car station located on the Danube stands like a haunted house above the river.

The abandoned military base looks like a post-apocalyptic wasteland.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

A museum dedicated to the former country.

Structure built from the skulls of vanquished foes.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

The cutest way to stay safe in traffic.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Vast stretch of tide-pools with a unique Moroccan charm.

Series of underground houses inhabited continuously for centuries.

This French chateau is home to the world’s largest private collection of fighter jets.

The largest airborne operation in history was launched to capture this bridge.

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

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

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The legacy of a Moroccan Jewish community is remembered at this little mouldering cemetery.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.