Kuala Selangor is a fantastic nearby getaway. There are those monkeys at Malawati Hill, the lighthouse and nature park, the seafood and fishing village of Pasir Penambang and if that is not enough, there is also Auntie's Kopitiam, Cendol Bakar and more.
It may be a good idea to stay at the De Palma Inn (link at below) which is near to these places. Don't forget the Fireflies Park and the beautiful Sri Shakti Temple. Links to most of these places are given and as with all my pages, alternative and other nearby accommodation options are provided: