The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

The first declared National Monument in the United States.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This sprawling collection hides many charms.

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

This black church sits alone among a field of lava rock.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

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

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

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

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

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

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

The world's largest moose statue is located (where else?) in Canada.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

Most-visited and most-photographed slot canyon in the American Southwest.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Oddly shaped rock formation, misassociated with a nearby utopian community.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

A museum dedicated to exhibiting remarkable outsider art.