(First of all, tourists travel for entertainment, and it's just what they get for a journey indeed. When travelling, you can put your work and pressure aside, concentrating on the beautiful scenery along your trip. You cannot be more relax when nature embrasses you.
Secondly, tourists gain knowledge from travelling. It is said that one thousand books cannot eaqul one thousand miles, which means that you learn more when you put your theories into practice. For example, tourists get to know the culture and history of the place they visit, and contact with people make them more wisdom.
In addtion, travel helps people build new relationship with a new group of people. During several days' interaction, tourists make new friends among themselves, some of whom may be reserching in the same field or doing business in the same trade.
So enjoy your travel.)