Didn't fancy it much myself, so I took a walk up the road to see the Царска Бистрица, or Tsarska Bistritsa, a royal hunting lodge built for Tsar Ferdinand just before WW1. It was of course confiscated when Bulgaria became a communist republic, but the deposed Tsar Simeon, who was a child when the monarchy was abolished and was taken into exile, returned after the dissolution of the Soviet bloc in 1991 and was democratically elected Prime Minister. The restitution of the former royal estates was, controversially, one of the results, so Bistritsa and the other royal dosses are back with the Saxe-Coburgs. The interior is said to be impressive (incorporating a complete captain's cabin from a Transatlantic liner, I was told), but I can't confirm this as it was shut.