An hour south of Dallas in Italy, Texas there is a whole community contructed from concrete domes; the Monolithic Dome Institute. Establish in 1996 as a "research park", the institute has more than 37 buildings. Founder David South also lives at the institute in a 2,000+ square foot home. There are multiple one bedroom structures for rent.
The Dallas Observer states that the domes are incredibly efficient and safe. The VP of sales is quouted stating they aren't a cult.
The institute hosts an open house every October.