One of several train stations serving the town of Versailles. Coming from Paris, I took the L line from Gare Saint Lazare (leaves about once every 20 min, make sure it's the specific L line that ends at Versailles Rive Droite and not some other destination) and this is the last stop.*
The station itself isn't that large, just a simple couple rooms and an outdoor train platform. There is a bus stop directly outside the station. Take bus #s 1, 3 or 4 to bring you closer to the palace area of Versailles, or you can take a ~17 min leisurely walk to see a bit of the town before hitting up the main attractions.
*Total time takes about 40 minutes and you need to purchase a one-way or round trip zone 1-5 ticket, OR do an unlimited Mobilis one-day ticket for zones 1-5. If you do the train tickets only, and want to take the bus once you get to Versailles, then you need to purchase bus tickets for within 1 zone separately. Would suggest to buy all these in advance at your train station of origin to avoid having to figure it out later. read more