When a person stays or visit a region or a country less than a day (24 hours), then he is excurtionist.
If he is staying more than 24 hours then he becomes tourist.
guests who stay less than 24 hours
sightseer: a tourist who is visiting sights of interest
Tourise=person who travels/visits different places of interest Excursionist=person who delves into the many different activities of where they are visition. Sort of an adventurist.