This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

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

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

3,000 market stands in five former Zeppelin hangars.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

The modern birthplace of Irish freedom.

A hugely vast Irish landscape of barren rock that stretches for miles.

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

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.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A restaurant and observation deck built in a unique broadcasting antenna.