Sorry this program is broken, i can`t underline anything anymore. Whatever. Prague Castle is the main attraction of Prague and you just have to visit it. You will see it, soon after you arrive, it`s visible from many parts of the city. It`s located on a hill so you have to walk like a million steps to get up there, honestly it`s pretty exhausting, but you`ll make it. It`s a huge complex, the biggest of its kind in Europe i think. It`s clean and calm. The military is watching you, but not in a discomforting way. The president of the Czech Republic lives there and you can visit the St. Vitus Cathedral. There`s a really small way called " Golden Alley". After 5 pm you can visit it for free. Everything is small there. It`s a short street and the shops aren`t spectacular, but it`s famous.