This one of my favourite borders, not only is it easily accessible being situated in Devin on the outskirts of Bratislava, it formally marked the iron curtain between Czechoslovakia and Austria and was heavily fortified. Now there is an impressive monument “The gate to Freedom”, border posts and information boards. It is also a border that can be viewed from a number of perspectives, from the bank, from a boat and high above from Devin Castle. The colours of the 2 rivers often contrast too.