Olson Kundig Rio House is elevated on chunky concrete columns in Brazilian rainforest

A board-marked concrete chimney raises this house designed by US architecture firm Olson Kundig to "hover" above its surrounding in the Brazilian rainforest.
Rio House was built for a couple that wanted a secluded retreat after many years of living in Rio de Janeiro.The 1500-square-foot (139.3-square-metre) house and its surrounding property is on the border of the Tijuca National Park, a tropical rainforest outside of Rio de Janeiro.
Two chunky concrete pillars hoist a horizontal steel volume a