This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

This peaceful garden is hidden on the grounds of a spiritual organization founded by a pioneer yogi.

A series of labyrinths in the Nevada desert inspire meditation and calmness.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

Spiral labyrinth hidden in the hills above Oakland, CA.

Take a dip in the world's largest mineral hot springs pool.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

This set of hot springs also comes with fantastic views.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

One of the last free public hot springs is decorated with hippie art.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

This naturally-sourced hot spring is now home to a clothing-optional resort.

The largest public collection of roses in the United States.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This beautiful landscape is the only Sichuan-style garden outside of China.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

Over a century old, this restored Victorian building is surrounded by a lush garden filled with rare palms.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

A piece of solitude and tranquility in the heart of East Saint Paul.

A lush Seattle garden designed by the same landscape architects responsible for New York's Central Park.

A grove of "candelabra redwoods" deep in California's Lost Coast.

This magnificent Japanese garden provides a moment of Zen in rural Vermont.

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

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

This once-private estate is now a dreamy, meditative garden that's open to the public.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

This scented city oasis was a labor of love.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

An art instillation for the sake of "raising vibrations."

A modernist landscape of water and sci-fi concrete.

The remnants of a creative early method of wildfire prevention.

A preserved stretch of ancient fossilized trees with an impressive gem collection to boot.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

These eerie outliers of the lightning bug family glow a mysterious blue color.

This frequently-photographed waterfall takes only a short hike to visit.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

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

Stroll through a wonderland of stupendous moss-covered trees.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

America's smallest "national forest" has only 33 trees.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

The fifth-longest natural arch in the world, and the longest outside China.

Hike amid the palm trees that thrive among Southern California's Indio Hills.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Each winter this underground cave forms a dazzling ice palace.

Rare recess caves fill this unbelievably beautiful Ohio park.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

A humid oasis combines recreation with exploration in a unique underwater cavern.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The short hike is worth the stunning views and crystal blue waters of a secluded beach.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

Canyon walls shrouded in ferns.

Have a steam and some blini at this cafe in a century-old bathhouse.

Underneath the bustling city streets, a hydroponic farm grows unique herbs in an urban oasis.

This Russian bar-restaurant lies within a three-story underground bathhouse.

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A public fountain that spouts "health water" from a nearby spring.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

This pebble beach is so beautiful that taking its rocks is against the law.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Hollowed out cedar log tubs set in an ancient towering forest.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.