from metro station "Karlovo namesti" (line B, south-west gate, close to river Vltava) follow the
map
(250 meters, takes 3 minutes)
if you happen to leave metro station "Karlovo namesti" (line B)
by the north-east gate, closer to the Charles square) follow simply another
map
(equal distance, shortcut leads through "Vaclavska pasaz");
(the slightly
longer (grey) trajectory leads through the slightly more scenic park).