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

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

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

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

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

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

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

No one knows the origin of this small town’s unique name.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

The ruined remains of an early hydroelectric dam.

Mysterious concrete spires left on a small Canadian hill.

The world's largest and most outstanding marl lake regularly changes color.

The first steel dam in the world and the only one still functional in the United States.

Giant telescope mirrors built in a spinning furnace under a college football stadium.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The world's largest military aircraft cemetery.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

America's only nuclear missile silo open to the public.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A reproduction of earth's many biomes.