This failed condo development was reborn as a street art hub.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Continuing the tradition of the dime museum in style.

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

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

Three columns of volcanic rock shoot out of the ocean.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

A psychedelic labyrinth on the San Francisco bay.

An emerald-green grotto just a short trip from Austin.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

These enlarged egg sculptures represent the native birds of eastern Iceland.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

A vintage video game wonderland in downtown Reykjavik.

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

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

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

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

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 valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A winding, blood-red tunnel of hardened lava navigable by foot.

Climb right into the heart of this colorful Iceland volcano.