Kaliningrad The Brandenburg Gate in Kaliningrad is the only gate of the city, which to this day perform its main function. The World Ocean Museum in Kaliningrad is an excellent museum complex, very interesting for both children and adults. The museum of amber is Alatyr, lying on the seabed, the tears of the sea goddess, the singing stone. Amber since ancient times attracted people with its mystery. Ruins of Koenigsberg Castle still excite the imagination. The island of Kant, previously called the island of Kneiphof, occupies a place in the middle of the Pregoli River.