The Hydra World Tour was a concert tour by Dutch symphonic metal band Within Temptation in support of their sixth studio album, Hydra, released by Nuclear Blast on 31 January 2014. To date, it was their eight major tour and their third to see them playing worldwide. The tour passed over four continents and was divided into several legs according to the local of playing, presenting minor setlist variations from concerts of the same leg and a few more variations from leg to leg. A special leg was entitled "Theatres on Fire", in which saw the band playing seated shows exclusively on theatres. The tour was commercially successful and managed the band to play on even bigger spaces, an improvement already seen on their last world tour, as well presenting their first concert at the Wembley Arena