Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

Secret hideaway for an alternative beach experience.

A treehouse assailed by the elements and the government, now gone.

A stone face watches over the river.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A red-brick beacon stands against the tempestuous Atlantic, on the windiest site in the United Kingdom.

A magnificent, iconic stone tower in the Scottish Highlands.

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

Three columns of volcanic rock shoot out of the ocean.

This stunning concert hall has become a symbol of Iceland's national recovery.

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

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

This beautiful, historic church looks like something out of a simpler past.

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

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.