Permanent vacation, not in the death way. That's what Metropolis Design's Spa House in Cape Town, South Africa, offers. Note the pool, seamlessly integrated into the property so as to coexist naturally with the outdoor spaces (hell, there are portals into it from lower floors). Staggered wood panels break up the exterior windows, and a little kitchen hut provides a sweet little detail to the main area. In short, the design details throughout are simply stunning.
The kicker? Yeah, it has to be the calming room "under the sea."