Sand Lily is a preserved reserve in Southeastern Bulgaria.

It was declared as a reserve on 29 June 1962 and was then re-categorized as a preserved reserve on 15 October 1999. The purpose of the announcement is to preserve one of the largest deposits of sand lily on sand dunes.

It is located in Kavatsite locality (Chayka), a few kilometers south of Sozopol. Covers part of the beach, has an area of ​​0.6 ha.

Sand lily is a perennial bulb plant. Its leaves are up to 50 cm long, flat and develop at the base of the stem. The stem itself reaches a height of 60 cm and blooms up to 10 large and snowy blooms with very pleasant fragrance flowers. The sand lily can be seen blossoming from July to August.