Exploring the music of Within Temptation is a lot like walking into a Gothic cathedral, the interior of which only grows more complex and immense with each step closer to the altar. Founded by guitarist Robert Westerholt and singer/composer Sharon den Adel, the concept-driven Dutch group largely specialise in symphonic metal laced with neoclassical choruses and church music-inspired solemnity. Yet Within Temptation possess a curious streak as well. Stepping far outside the boundaries of heavy metal, they have recorded audacious experiments in New Age music and electronic dance pop.