One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

A remarkable geological formation resembling a forest made of stone.

A market for witches is hidden within a train station.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Did Inca children also slide down these smooth rocky slopes above Cusco?

Hiding in plane sight.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

This small Irish village suffered the greatest loss of life when the Titanic sank.

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

A stunning Victorian abbey and walled garden on a lakefront.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

An 1814 castle that hosts an exhibit of "explorabilia".

The oldest licensed distillery in Ireland.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Three columns of volcanic rock shoot out of the ocean.

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

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

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

An encyclopedic collection of mammal penises.