Pydna is a former American missile base in Kastellaun, Germany. Nuclear-equipped MGM-1 Matador, MGM-13 Mace and Nike-Hercules Missiles were stationed here. It now hosts Nature One, a famous open-air electronic music festival. Festival facilities now utilize the very bunkers that were once home to 64 Ground-Launch Cruise Missiles (GLCM) (BGM-109), Tactical Nuclear Missiles, under the operational control of the 38th Tactical Missile Wing of the United States Air Force.