Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

A research lab and hands-on museum where visitors can experiment with retro technology.

This eclectic collection documents the wild legacies of "America's Wickedest Street."

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

This museum offers an actual time machine back through Colorado's past.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A collection of over 15,000 zines works to preserve DIY publishing culture.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

A technicolor place of worship for Elevationists.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

In this century-old literary safehouse, print is alive and well.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

Home of modern dancer famously strangled by her own scarf.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A modern mechanical planetary system, part of a 10,000 year clock.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.