A true treehouse near Hawai'i Volcanoes National Park.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

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

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Watch the newest land on the planet form before your eyes.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Race through the maze, get your name on the sign.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

A tunnel of hardened lava along Maui’s famous Road to Hana.

This black shoreline is made up of exploded lava particles.

This unusual lava tube spouts seawater during high surf.

What remains of the summer palace of King Kamehameha III.

This WWII plane died a quiet death, and is now a garden eel playground.

This labyrinth was designed to help visitors focus and meditate.

This mysterious twin turboprop Grumman G-159 covered in graffiti has spent a decade and a half abandoned.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

Tour the sci-fi-esque reality of governmental disease management.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

An underground magnet for ever-changing street art.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

One-of-a-kind museum inside the first Boeing 747-400 ever made.