It's an empty ticket booth. There's different bus tickets hanging from the eaves of the stall, each to a different destination in the Three Realms. A small plaque on the counter reads "No seeds necessary. Tear the ticket in half to activate it. One use, one way only. Enjoy your trip!".
To read more about each destination, check out the World Encyclopedia page!
Energy to purchase tickets can be collected from your characters once a day. Spend it wisely!