The Danube Delta Museum — part of the Eco-Tourism Museum Centre — is the essential first stop in Tulcea before you head out onto the water. The ground floor is given over to dioramas of the delta's main habitats: reed beds, willow forests, sand dunes, freshwater lakes. The aquarium downstairs has around 100 species of native fish, including sturgeon and a vast wels catfish.
Upstairs you find ornithology exhibits with mounted specimens of all the major delta birds — Dalmatian pelicans, white-tailed eagles, glossy ibis — and a small section on the delta's traditional Lipovan fishing villages. Two hours here will make the boat trip that follows considerably more rewarding. Captions are in Romanian and English.