As far as names go, the Vertical Glass House is about as misleading as they come. The house is vertical in that it was built up, not across. However, the glass the house's name references comes in the form of glass floors, not windows. The building is concrete and has only one window, which also doubles as its roof. The result is a house with a giant skylight and a floor that looks down into the bathroom below.
The Vertical Glass House was originally designed by Yung Ho Chang in 1991. Chang founded the architectural firm Altelier FCJZ, and he recently brought his original concept to life some 20 years later. While the house does lack windows, it's not exactly a dungeon as the glass floors allow sun from the roof to fill the whole house. The Vertical Glass House was designed to be used as both an exhibition and a guest house for visiting architects.