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

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A sulfuric martian landscape that looks far better than it smells.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

The history of Reykjavik told through a historical village and live actors.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The history and future of cannabis.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

A huge museum of much more than just agriculture displayed in a princess's palace.

An extensive collection of ancient Egyptian artifacts and mummies.

An encyclopedic collection of mammal penises.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

Legend holds that St. Paul was flogged for preaching Christianity at this pillar.

This saucy statue once caused outrage among locals.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.

A monument dedicated to the civil uprisings that took place during the Pots and Pans Revolution.

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

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.