You can take a tour (by mini bus) visiting Nessebar, Sunny Beach, Djuni, Sozopol and Burgas.
Nessebar is a cultural town with only hundreds of years old traditional Bulgarian buildings. Sunny Beach and Djuni and Sozopol are both beautiful sea resorts. Sozopol0 is a small resort hidden and isolated by mountains and Sea, where a lot of writers and artists used to settle for inspiration. Sunny Beach a bigger resort with shopping centre and market.