The traditional climbing gym is about to evolve—or at least that’s what the owner of Brooklyn Boulders believes. With a second, satellite location slated to open this spring in Somerville, Massachusetts, the company is planning to house an unusual and disparate blend of climbing, retail, working, and community spaces under one roof.

We’ve scoured the gear archives and the history of sport across continents and eras to compile our first attempt at an authoritative list of the 100 most important outdoor inventions ever