This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

The world's second largest single-dish radio telescope, once used to contact E.T.

The largest freshwater lake in the Florida Keys.

"We Seceded Where Others Failed."

A monument celebrating the idea of reaching inaccessible places.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A fitting attraction for the corn capital of the world.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

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

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.