An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Three columns of volcanic rock shoot out of the ocean.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Walk in the footsteps of the gods and straddle two tectonic plates.

Medicinal spa created with the discharge from a geothermal energy plant.

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

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The first American woman to win the Nobel Prize in literature came from the foothills of Appalachia.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.