Rising from the central plains, the iconic rocky outcrop of Sigiriya is perhaps Sri Lanka's single most dramatic sight. Near-vertical walls soar to a flat-topped summit that contains the ruins of an ancient civilisation, thought to be once the epicentre of the short-lived kingdom of Kassapa, and there are spellbinding vistas across mist-wrapped forests in the early morning.
Sigiriya refuses to reveal its secrets easily, and you'll have to climb a series of vertiginous staircases attached to sheer walls to reach the top. On the way you'll pass a series of quite remarkable frescoes and a pair of colossal lion's paws carved into the bedrock. The surrounding landscape – lily-pad-covered moats, water gardens and quiet shrines – and the excellent site museum, only add to Sigiriya's rock-star appeal.