This is fascinating interior staircase idea, this house located in Singapore and designed by ong&ong. This is beautiful house that has a glass enclosed courtyard in the center with amazing spiral staircase that leads to the roof top terrace. The staircase is huge and dark and made of steel. It’s so interesting in contrast to the natural feel of the rocks and stones and trees of the courtyard. This is really cool house that has a clever staircase idea and views of the courtyard space throughout the home. via.