Longform stories and essays exploring Colorado Springs's history, culture, and untold stories.

Colorado Springs wasn't built on gold or railroads. It was built on tuberculosis. By 1900, one-third of the city's residents were infected. Sanitariums lined the foothills. "Lungers" filled the boarding houses. The city marketed itself as a place to die slowly and comfortably — and it worked. Then antibiotics cured TB, the sanitariums closed, and Colorado Springs had to find a new reason to exist. The military-evangelical city you know today rose from the ruins of a tuberculosis resort.

They called it the worst crime in Colorado Springs history. On a September night in 1911, someone entered two homes and killed six people with the blunt end of an axe — a man, his wife, their toddler, and a woman with her two children. Every victim's face was covered with a sheet. Every mirror in the houses was draped. The killer vanished and was never found. A century later, researchers believe the murders were the work of a serial killer who rode the railroads across America, leaving a trail of axe murders from Colorado to Iowa.

In 1899, Nikola Tesla chose Colorado Springs for the ultimate mad scientist experiment: generating artificial lightning. His 80-foot tower produced 135-foot electrical discharges — so powerful they fried the local power company's generator and plunged the city into darkness. The site of his laboratory is now a parking lot with a small plaque.

General William Jackson Palmer founded Colorado Springs in 1871 as a resort town for wealthy tuberculosis patients, a place where the dry mountain air and sunshine might cure what medicine could not....