Ancient snack bar of the Roman Empire re-opened.

The only castle in North America to ever house European sovereigns.

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

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.

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

Now containing the bones of the actual conquistador, instead of someone else.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

A museum dedicated to the history and exploration of both popular music and science fiction.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A terrific purveyor of natural history objects and curios.

Try not to get slimed in Tribeca.

An unrealized dream to wirelessly electrify the entire Earth.

Stone shrouds of Prince Liu Sheng and Princess Dou Wan of the Han Dynasty, created to preserve their flesh for eternity.

The Origin of On the Origin of Species.

One of the world's largest ancient burial mounds.

137 graves holding New England's earliest residents.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

These azure waters were thought to lead to the Mayan Underworld.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Abstract dinosaur models in London.