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

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

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

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

A true treehouse near Hawai'i Volcanoes National Park.

This black shoreline is made up of exploded lava particles.

The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A controversial memorial at the place where Captain Cook met his violent end.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

A working model of a pressure-driven, high-speed rail whizzes around a private vineyard.

This giant shopping mall still holds signs of its automotive past.

San Francisco Bay's ghost town.

A celebration of once forgotten materials.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

Dive bar built out of the remains of a whaling ship.

Playable, historic pinball machines fill this Alameda museum.

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

A vast city of the dead, where the deceased outnumber the living by more than a million.

A large instrument played by the wind.

The first high-tech company in the valley that actually worked with silicon devices.