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

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

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.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

Walk in the footsteps of the gods and straddle two tectonic plates.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

This scenic Icelandic lava flow is named for a pair of Berserkers who were murdered, according to a famous Saga.

Dozens of large, brightly-colored paintings adorn the walls of the "street art capital of Iceland."

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This black church sits alone among a field of lava rock.

Europe’s most powerful hot spring supplies the surrounding region with hot water.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

These large-scale reproductions of Mario Sanchez’s colorful pictures and murals feel like a walk around a small movie set, and also lead you down an imaginary “street” of past decades.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A historic presidential getaway on the continental United States' southernmost island.

A monument celebrating the idea of reaching inaccessible places.

"We Seceded Where Others Failed."

The highway's southernmost spot is a beloved local attraction.

Recently celebrating its 25th anniversary, the garden opened in September 1997 to celebrate the men and women who have had the greatest impact on Key West.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.