TianGong:
From the page: "Located on a side-street in a hipper part of Tokyo sits this 914 sq-ft (85 sq-m) glass house. It is named the NA House and was designed by Sou Fujimoto Architects. The various levels are linked by an assortment of stairs and ladders in addition to short runs of fixed and movable wooden steps, which is unique, but let窶s be honest the main draw of the house is that it is almost completely made of glass."