It's probably a part of the question what to show at each zoom level but anyway:
"Zlý časy" looks like it icon is hidden by the its own title,
icon of "Divadlo na Fidlovačce" is hidden by title "Botič" which belongs to stream not rendered there(!)
the icon hidden by the end "e" of title "Divadlo na Fidlovačce" is unclear what it belongs to: "U Hrabánků" or "Bowling v Továrně"?
title "U Banshetů" belongs to the church, Hospital or something else?
"kaple sv. rodiny" icon - what's its real shape? Can't guess, it looks hidden partially by streets and railways. Is the small violet line above its main shape a part of the icon or not?
From http://alpha.map1.eu/#zoom=15&lat=50.06435&lon=14.44149&layers=BTTT :
It's probably a part of the question what to show at each zoom level but anyway: