These mansions date back to Chicago's days as a brewer's paradise.

Seller of surplus nuclear research materials.

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Some of the Old West's most notorious outlaws frequented this mining town.

The building stands within a quiet, postcard-perfect New Mexico village.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

The world's largest washing machine collection has more than 1,400 antique items in its exhibit.

The first of Lancaster's "rural cemeteries."

Its unique collection details the history of the state's svelte railroads.