A beautiful, but toxic, lake formed by mining.

An incredible garden taking over the interior of a massive sinkhole.

Australia's first open air museum and antique 3D theater.

A clear example of the process of erosion in action.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Dilapidated ruins that once treated a notorious young serial killer, currently hosting vandals, squatters, and ghost hunters.

Australia's largest traditional hedge maze features a Great Gnome Hunt.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

Australia's largest medical museum featuring a 19th-century pharmacy.

Putt your way around Australia in a black light environment.

Occult books, tarot, oddities.

Rainforest filled with record-holding eucalyptus.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

A museum which takes visitors to the côté obscure of Paris.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The celebrated eyesore created by starry-eyed sweethearts.

Ruins of a 10th century church tucked away deep in a botanical garden.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A curious collection of locks and keys.