Nessebar is surrounded by 10 hectares of beautiful sand dunes, formed by the wind over thousands of years. The vegetation is sparse, making the complex a fragile eco-system that is carefully managed, particularly because it is habitat for some very rare species of bushes, flowers, and grasses
Source: https://visitworldheritage.com/en/eu/sand-dunes/64d6738b-fb6e-405a-b8be-a3abc8d67a01
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