This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

An artist sees trees as a medium for sculpture.

The artist David Nash planted a circle of trees in 1977.

At this unusual park, domes, ladders, chairs, and more are made from trees.

Made from trees and then abandoned, this fence is still growing along a path in Germany.

For centuries, Germans have been dancing in trees.

Where lovers tie birch branches into long-lived knots.

A botanic garden full of trees twisted into fantastic shapes and positions.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

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

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

Centuries-old bridges grown from tangled roots.

A 100-year-old chair with joints "cemented by nature."

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

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Elevated freight railway turned wildly successful urban park.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

In paradise, feral pigs have claimed an island all to themselves.

Cave where bat-eating snakes hang down from the ceiling.

Morocco's Argania trees are infested with nut-hungry goats.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.