Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

Hundreds of caves once used to store grains and animal feed.

Rumors and legends of secret Nazi activities surround this eerily remote island mansion.

A completely underwater art museum sends a stark message about humans' impact on the environment.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

An ode to one of the first concerts broadcast via satellite.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

A unique set of caves that spits waves back out into the ocean.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

This legendary urban waterfall creates a dazzling display of rainbows.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

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

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.

This blowhole is supposedly caused by a trapped monster.

Submerged lava formations create incredible waterworks.

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

This black shoreline is made up of exploded lava particles.

The rusty hull of this 1899 ship serves as a tribute to explorers of the bottom of the world.

A wooden dock art installation on Chiloé Island taps into the island's indigenous mythology.