Curonian Spit National Park (Lithuanian: Kuršių nerijos nacionalinis parkas) is one of the five national parks in Lithuania. It was established in 1991 to protect the unique ecosystems of the Curonian Spit and Curonian Lagoon.

Curonian Spit National Park is protected by the state, under the Lithuanian law of Protected Areas. Since 1997, it is a member of EUROPARC Federation. The park has Category II in the classification of the IUCN.

Nagliai nature reserve protects the Dead dunes. Dead (Mirusios) or Gray (Pilkosios) dunes are large sand hills built by strong winds, with ravines and erosions. Nagliai nature reserve offers habitat for rare plants, included in the Red Book, four villages and two old cemetery sites that are hiding under the sand. Any human activity is prohibited in the reserve except for scientific observations. The cognitive trail of Nagliai is the only place from which the reserve's objects can explore .

From 1675 to 1854, four Nagliai villages here were covered in sand.

• List of national parks in the Baltics
• Curonian Spit National Park (Russia)
• Parnidis Dune

• Official Web page of the Park Archived 2015-05-14 at the Wayback Machine
• The Trail of Nagliai Nature Reserve