If you only get one stop alone in Prague, make it Charles Bridge (30 statues, begun 1357, 516 m long). Next on our list are Astronomical Clock (apostles parade hourly, 9am-11pm) and Prague Castle Grounds (free courtyards, open 6-22, noon guard); the other three, down to Letná Park, are below with where to book.
bridge views, beer garden, metronome
free grounds, river views, open 10-18
299 steps, 1:5 Eiffel copy, from 1891
free courtyards, open 6-22, noon guard
apostles parade hourly, 9am-11pm
30 statues, begun 1357, 516 m long