Take a long walk in Sunny Beach. In the northern part of the city, on the border Sunny Beach and Sveti Vlas you can find a summer arbour. It's a great viewpoint to watch a panorama of Nessebyr, Sunny Beach and Sveti Vlas.
Going from Sunny Beach to Sveti Vlas before you get to summer arbour, you should find some bushes and also the stones on the left side. Explore this place, especially stones.