Nida (German: Nidden) is a centre of Neringa City municipality in Lithuania Minor region and located on the Curonian Spit. First settled by German in the 15th century AD and part of Prussia before 1945. It is very popular with German tourist because the German writer Thomas Mann had a summer house which he regular visited in the early 1930s.
Most travellers arrive via ferry from Klaipeda. There's an ecological fee to enter the national park (which Nida/Neringa is part of) - 30 LTL/car in summer and 10 LTL the rest of year. The Nida-Morskoye land border crossing point to Kaliningrad Oblast has a 24 hr service. Ecological fee - 250 RUB. Travel to Russia requires a valid Russian visa. The port has no regular passport/customs services, contact Nida border station (Smiltynės plentas 23) in advance, tel.: +370 469 52284.
You can rent a bicycle and ride all the way to Juodkrante (about 30 km), visiting Preila and Pervalka en route. The bicycle track goes by the Curonian Lagoon for about 15 km, then through a pine forest and finally by the sea, letting you to see lots of beautiful sceneries. Don't forget to stop by the Vecekrugas dune (~1 km before Preila) and the Dead Dunes (Negyvosios kopos) (near Pervalka).
First of all - fish. Try some smoke-dried eel or bream.