This antique rail car has been reborn as an urban cafe.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

No one's quite sure where this quirky university tradition originated.

The only arched bridge made of stone on the entire Mississippi River.

America's first federal monument.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

A natural gas leak provides a flickering flame beneath a waterfall.

Enormous array of antennae fill a desert valley.

This well held a sacred source of water supposedly unleashed from the barren rocks by a wizard-like archbishop.

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 remarkable geological formation resembling a forest made of stone.

The world's largest clay lick, where parrots gather to snack.

These delicate ruins need more tourists to keep them from fading away.

A jungle cave in Peru of unknown depths, otherworldly sounds, and strange nocturnal birds that navigate by echolocation.

One of the most remote lodges in the Amazon offers rare wildlife encounters and undisturbed views of the Peruvian rainforest.

An abandoned Incan construction project left behind a mysterious "doorway."

A fascinating little museum all about the rich history of Peru’s famous plant.

The depictions of slaughter are surprisingly detailed at this mysterious ancient site.

Mysterious "dots" seen from a satellite in southeast Peru.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

It took 82 years and four different plaques to finally get the story right.

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

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