... but not immediately. Some variations on the rules prevent this or make it difficult such as the requirement to only approach a station from the south. My experience as a keen spectator is that the player who revisits a station puts themselves in a vulnerable position so I don't see this in the professional game more than about once a year. The famous exception is the record of the game played by King George where he kept naming the same station at every move.
... but not immediately. Some variations on the rules prevent this or make it difficult such as the requirement to only approach a station from the south. My experience as a keen spectator is that the player who revisits a station puts themselves in a vulnerable position so I don't see this in the professional game more than about once a year. The famous exception is the record of the game played by King George where he kept naming the same station at every move.