Literally translated the words mean the following: bei = near an = at in = inside of auf = on top of although in context, they have different meanings, so for example "auf der Bahn" doesn't mean "on top of the train" but rather "on the train" as in "taking the train" . This is Dativ, since the article for "Bahn" is "die" but with the preposition "auf" it changes to "auf der Bahn", much like in your example "auf dem Markt". The article for "Markt" is "der", in conjuction with the preposition it changes to "auf dem Markt". Prepositions are a fun thing to learn. *^_^*

Jag har försökt "Pimsleur's Swedish" men det är inte så hjälpsamma som den japanska versionen. :)

My favorite ice cream flavor, without a doubt, has to be Stracciatella (a vanilla based ice cream with chocolate shavings). Although, if you ever get the chance, do check out "Sunshine City´s Ice-Cream-City" in East Ikebukoro, Toshima, Tokyo!  They have the most abstract flavors of ice cream in unbeliavable quantities.  Doesn´t salad flavored ice cream just make your mouth water???