To our knowledge, San Antonio doesn t have any underground missile silos, but an unusual home that hit the market in Southeast San Antonio sure looks like it could have been converted from one. In reality, it was built in 2017 by an owner that had some unusual demands, including that his cylindrical, metal-clad pad be uber-secure from the outside, fire resistant and equipped with solar panels. According to the listing agent, the house s rooftop solar array provides roughly 70% of its power. A spiral staircase curls up the side of the home, allowing access to a modern minimalist interior with two bedrooms and two baths. A rooftop deck and lounge area boasts impressive views of the 14 acres surrounding the one-of-a-kind hideaway.