Created by redditor LeadingEight, this beautiful chair is a true work of art. It is about 9 feet tall/wide and made completely out of steel except for the seat cushions. The outer ring is stationary for stability and the two inner rings spin around horizontally so you can sway as you like. A fun interactive creation that might inspire you to DIY!
It is located at Taliesin West, the Frank Lloyd Wright school of architecture in Scottsdale AZ.