We’ve seen quite a few interesting building transformations over the years, but nothing as ambitious as trying to convert a natural rock formation into a house fit for Tony Stark. That’s exactly what Shanghai-based architect Amey Kandalgaonkar did with his House Inside a Rock concept. The 3D rendered concept was inspired by the rock-cut tomb and architecture of Saudi Arabia’s Madain Saleh and features minimalist concrete slabs and a number of rooms (including a pool!) exposed with huge pieces of glass. It’s brutalist and futuristic while still being organic and minimal, which means it checks all the boxes of things we love in architecture. As Kandalgaonkar told Designboom, “considering the visual complexity of the rocks at madain saleh, it was imperative to use simple planes and cubes in order to achieve a visual balance. I started out creating the rock in 3D software which in itself was a sculpting process. later when inserting the house into this rock, I tried to keep its visual impact from eye level as minimum as possible and only when observed from a bird eye, the real extent of the intervention is revealed.” Unfortunately, it’s only a concept at this point because no billionaires have stepped up to see this idea turned into reality.