Must Sees Prague, highlights the best of this thousand year-old city for a 24-hour visit, a weekend or longer. At Old Town Square marvel at the fifteenth-century Astronomical Clock. Visit Prague Castle; explore the old Jewish quarter, stroll across Charles Bridge. Peek into stellar churches to glimpse fine interiors and artwork; shop for Czech crystal and glassware; sample some traditional goulash. Then take a car to visit several nearby UNESCO World Heritage Sites.