This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Rocks carved with biblical passages in the 1800s.

This abandoned urban warfare facility is a dream come true for airsoft and paintball enthusiasts.

The dome-shaped reservoir of this old water tower produces unique acoustic effects.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

18th century opera in its original splendor.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

A peat bog in southern Sweden provides a cozy and photogenic home for junked Volvos, Saabs, and the occasional American muscle car.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

Hundreds of mossy stones engraved with bits of philosophy, literature and random musings.

The single richest source of elemental discoveries in the world.

Micro-nation based around a nine-story high illegally built tower.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

Crooked windswept pines give this old forest an enchanted and magical look.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.