The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

A secret climbing tree hides along the side of a Costa Rican road.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

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

Iceland's first pagan temple in 1,000 years is underway in Reykjavík.

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

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

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

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

This fairytale-like structure is the last turf church ever constructed in Iceland.

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

A little-visited waterfall in an otherworldly landscape.

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

This replica Viking village was created for a film that was never shot and is now open to visitors.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

The oldest church in Iceland is one of the few to feature ornate decoration.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

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

Climb right into the heart of this colorful Iceland volcano.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Rising from the sea like a stone monster.