It's the judicial seat of the comarca of Marina Alta, in the province of Alacant, Spain, on the Costa Blanca halfway between Alacant and Valencia.
A partial ruin of a fortress stands right in the middle of the town.
The two major airports near Denia are in Alicante and Valencia. Alicante is frequented by holiday carriers whereas Valencia is operated by the major carriers (like Alitalia and Iberia).