On Paradise Point's property you can rent a sail boat, jet ski, stand-up paddle board and more! If water is not your thing, they also have bike rentals!
Torrey Pines Reserve has a great hike along the bluffs that leads to the beach. The hike does have some steep areas along the way. If you want to park at the official start of the trail, there is a parking fee. However, you can find street parking surrounding the area.
Old Town provides a sense of San Diego's history including the Whaley House which was rated the most haunted house according to the Travel Channel's America's Most Haunted. Additionally, if you are in the mood for authentic Mexican food, Old Town is the place to go!