Only after spending 4 days in Kaliningrad , discovered that it is physically separate from the Russian mainland..
Quite a big task Russia has managed by keeping Kaliningrad in its flock, with a spate of breakaway states from the erstwhile USSR around it.
An interest article about Kaliningrad seen in the link below.
And a picture to know where we actually are. :-)
One of the major attractions around Kaliningrad is the Black Sea.
Some information here
