There is also a 3,000 square foot guest villa, Vegas-style fountains, staff residence, horse stables with eight stalls, arenas and trainer’s quarters, golf-driving range, an underground shooting gallery accessible through a secret tunnel and bulletproof door, greenhouse, spa with a grotto bar, an indoor-outdoor dog villa, a pool and waterfall, and a one-bedroom guest suite built into caves behind the waterfall. The asking price is $16,500,000.