An elevator into the Baltic Sea.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

A part of the world's largest marsh seems to be growing bright red Martian grass.

An isolated village literally built into the crevices and rock formations of a mountain.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Home to the "Circus" trees created by Axel Erlandson.

Centuries-old bridges grown from tangled roots.

This Sumatran root bridge took almost 30 years to knit itself together.

Two small chapels housed inside an ancient tree.

Natural cathedral designed by Italian artist Giuliano Mauri.

Living trees form the structure of an open-air palace.

Exotic feline breeding compound and conservation center.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

The only theatre in the world constructed specifically for sound movement.

This sculpture is an instrument played by the swell of the seas.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.