This “living museum” at UCLA exhibits thousands of plant species from all over the world.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

This picturesque medieval monastery guards a small trove of historic treasures.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

These fantastically named natural pools look like something out of a Scottish myth.

Dramatic river bend surrounds a natural red-rocked pedestal.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An exquisite tunnel of cascading flowers.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Rippling sand dunes frozen in the Arizona rock.

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