fairy tale tower at the quinta da regaleira palace sits atop a hill in the portuguese town of sintra

world unesco undefined tunnels tree travel town tower tourist tourism tour temple tale style spire sits site sintra secret scenic ruins royal romantic rock religion regaleira quinta quail portuguese portugal plaza plant pinnacles pena passageways park palace octagonal national mystical monument monteiro monastery millionaire manor lush lisbon lisboa landscape landmark initiation house history historical historic hill hidden heritage group gothic gargoyles