It's my first visit to Prague , I'll be here for three days for a conference , then I have a day on my own to do some sightseeing before I head back home . What do you suggest I see when I'm here ?   There are many interesting places you should be sure to see . One problem is transportation , however . Because the city is very old , the roads are narrow and congested . If you only have three or four days to visit , you don't want to spend them waiting in traffic in a cab . I suggest you take the subway .   The subway ? But is there a subway station next to my hotel ? I have to go between the conference center and the hotel several times a day ...   No worries , there's a subway station at the conference center itself , and a shuttle from your hotel to the conference center that takes only 5 minutes . When you do your personal sightseeing , you can first take the shuttle to the conference center , then hop on the metro .   Is it expensive to ride on the underground ? 