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.

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

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

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

It houses the remains of a 17th-century version of the Titanic.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

The "Little Ones," show Portugal in full miniature splendor.

Elaborate tile work in this railway station tells the story of Portugal.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

One of the largest Roman settlements in Portugal.

The corpse bride of Portugal.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.