These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

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

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Home to items never before seen by the public.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This replica of the Greek structure is in the heart of Nashville.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

A speakeasy takes on Chicago's drinking culture.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The final resting place of New Orleans' most famous voodoo priestess.

The first ever diner included on the National Register of Historic Places is famous for its custard French toast.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.