The castle is amazing. It's set above the town, and can be seen from almost anywhere in it. It's lit up at night, which makes it even more beautiful then.
Quick Tips:
If you are coming here in the summer, it's a good idea o book your hotel / hostel beforehand, as the beds here are in short supply in the high season.
Best Way To Get Around:
Getting here from Prague is easy - there's a train from Prague that takes between3.5 and 4.5 hours, depending on how long you have to wait for a connection at Ceske Budejovice.
Buses also come from Prague, and are faster and more expensive.