birdwatching
Go birdwatching in Maritsa delta and nearby lakes for example Lake Gala.
Take a stroll
On the beach or in the pine woods near the beach.
Swim
In the crystal blue sea. however, be careful as it gets deep very quickly as you move away from the coastline.
Watch the sun
Setting behind the greek island of samothrace, that huge black mountain rising suddenly out of the sea.