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

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This black shoreline is made up of exploded lava particles.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This legendary urban waterfall creates a dazzling display of rainbows.

Ice cream stand, snack bar, and time capsule of milk conveyance.

This beautiful architectural gem was the first waste treatment facility in Boston.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The headquarters in Salem doubles as an occult art gallery.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A museum chronicling pioneer life constructed over Interstate 80.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

Nature's biggest mammal swims in landlocked Oklahoma.

Once in disrepair, the house where the 1983 film was shot has been restored and turned into a museum.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

This unusually circular centenarian barn became a Route 66 icon.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.