There are aquariums with the Lithuanian fresh water fish, with the fish from the Baltic and tropical seas, prepared sea fauna expositions in the main restored redut.

Modern exhibition about history of the castle and the city, foundations of the castle, nice view of the old town.

Originals, models or reconstructed copies of the ancient calendars, sun, water, fire and sand clocks, mechanical time measuring devices to the modern electro-mechanical, electro-magnetic and quartz clocks are on display.

The ethnographic exhibits represent the region dwellers lifestyle, traditions, and the dramatic Lithuanian-German relations.

The visitors can obtain original pieces in the working forge of the Museum.