Right next to the iconic Skradinski Buk waterfall on river Krka, you’ll find Jaruga Hydroelectric Power Plant, the first alternating current power system in Croatia constructed after Tesla’s design. An impressive fact for the NP to boast, but there’s more: the Jaruga is the second oldest hydroelectric power plant in the entire world, having opened only two days after the world’s first – Tesla’s hydroelectric power plant on Niagara Falls. Both hydroelectric plants were based on the work of Teslas design, using AC system patent. These power plants were built during the “War of Currents” between Nikola Tesla and Thomas Edison as to whether alternating current or direct current electric power would prevail, and successful operation of first AC hydroelectric plants led to adoption of alternating current at much larger scale and its eventual dominance worldwide.