100-year-old shipwreck you can walk up to at low tide.

The longest continuous lava tube in Oregon.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

A heavenly experience, right here on Terra Firma.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The premier place to experience the Victorian imagining of the steam-powered future.

Read a book next to a Midtown waterfall.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

This scenic Icelandic lava flow is named for a pair of Berserkers who were murdered, according to a famous Saga.

This remote eatery and museum is preserved as a time capsule of a small Icelandic fishing town.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

A modern mechanical planetary system, part of a 10,000 year clock.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This sculpture is an instrument played by the swell of the seas.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This elegant arc of a waterfall marks a religious turning point.

This modern monument to pagan belief looks like it was transported straight from ancient times.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.