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

This giant sculpture made of trash is a critique of society's wastefulness.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This monumental fountain has moved around the city multiple times.

This medieval city gate is now a blend of the past and the modern world.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

A vast Communist-era exhibition space in the Bulgarian capital.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

The largest whale museum in Europe allows visitors to walk among life-size giants.

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.

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

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Along this wire fence, travelers have been leaving a particular memento since 2012.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Three columns of volcanic rock shoot out of the ocean.

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

A fountain standing as a testament to a doomed alliance.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.