Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

An ancient stone wall formed by lava that was a frequent stop during funeral marches.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

This abandoned villa of makeshift buildings was once the home of dancer Elis Sinistö.

Unlike many reclaimed, abandoned mines, this Canadian cave system is still just a dangerous maze.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

A scenic canyon with thick forests and historic ruins.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

Beautiful views and Roman-style statues on the Italian coast.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A beautifully well-preserved ancient Roman villa.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

The world's only managed flock of mute swans was established as a factory for monk meat but is now an adorable sanctuary.

This tiny town features a tiny town that acts as a 3D snapshot of the town during the 1950's.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.