Exploring - Benidorm is a massive resort and you can pretty much walk around the place on foot.
Most of us tend to stay in or around the Benidorm New Town part but a short walk in either direction takes us to new horizons.
The Rincon, Poniente, La Cala and the back end of the Old Town make a nice change form the New Town and is well worth exploring.
La Crux - That big cross on the mountain overlooking Benidorm is a must see. Although is a trek and may not be suitable for everyone, the views alone from here are well worth the journey up.
St Jaime Church - Located in the Old Town part of Benidorm St Jaime Church should be visited at least on a trip to the resort. Free to get in and as stunning as it is from the outside, the inside really is something.