Aliki lagoon is located in the regional unit of Rodopi, between the lagoons of Ptelea and Karatza. It belongs to the National Park of Eastern Macedonia - Thrace and is one of the so-called lagoons of Rodopi.
Aliki is a shallow, coastal lagoon and is surrounded by large salty marshes and coastal dunes, where there are no reeds or freshwater marshes. Its northern part is used as a salt flat. Being an important wildlife refuge, it is considered as a wetland of international importance Ramsar.
The area attracts species of the flamingo family, whereas, in winter the lake becomes an important habitat for ducks and waterfowl.