You can get "ride on a train" and "Get off a train at the same station you got on after completing a lap of the track" really easy. Take a car to one of the train stations. (4 in total I believe, I would suggest to use the one on the west side of the area in the top left or the onte south of the area in the bottom left (old town). Then at the train station, select the train and select get in (make sure you are on the correct platform). Then just wait at the same train station for the train to get back (about a minute) and select get out to pop the 2nd achievement.