Niagara Falls was first discovered by a French explorer in 1678 and brought to the attention of the western world. The tremendous volume of water never stops flowing, though the flow was once stopped completely by ice jams in 1848 and 1969. The world's first large-scale hydroelectric plant opened at Niagara Falls in 1895. Today, the American, Bridal Veil, and Horseshoe Falls produce nearly 2.5 million kilowatts of electricity through hydroelectric plants. Popular activities at Niagara Falls include tours like Maid of the Mist and Cave of the Wind, as well as attractions like the Skylon Tower, Rainbow Bridge, and Botanical Garden.