A 17-foot-tall freestanding play structure that designer Sharon Davis designed for her family in upstate New York can only be entered by climbing taut netting and entering through a trap door. Descending requires sliding down two structural-columns-turned-fire-poles.  Photo 6 of 7 in Modern Ladders by Allie Weiss from Kid-Friendly Treehouse in Upstate New York

Modern Ladders

6 of 7

A 17-foot-tall freestanding play structure that designer Sharon Davis designed for her family in upstate New York can only be entered by climbing taut netting and entering through a trap door. Descending requires sliding down two structural-columns-turned-fire-poles.