i was inside Old Town's Jewish cemetery (marveling at Rabi Löw's grave) only once.
it is usually crowded and entry is (substantially) charged — so not really a place to go at random to contemplate.
then, there is another Jewish cemetery (freely accessible, not crowded) where Franz Kafka is buried.
tho i looked for Kafka's grave only once as well.
lately, i was passing regularly (while commuting to work) next to a cemetery that offers as its most spectacular item a grave of a little girl (as if sleeping, her head supported by a pillow).
i took a snapshot and when i tried to get familiar with the (pre mortem) history of this little girl i encountered at least 3 different (contradictory) tales.
otherwise, as the most mysterious Prague cemetery is considered the abandoned cemetery that was affiliated with a local psychiatric hospital.
the place where local lunatics were buried in the past.
somehow or other, i didn't visit the place yet — but it is one of my (countless) plans.
tho wiki presents competing tale about the fate of Gavrilo's bones...
Fearing his bones might become relics for Slavic nationalists, Princip's prison guards secretly took the body to an unmarked grave, but a Czech soldier assigned to the burial remembered the location, and in 1920 Princip and the other "Heroes of Vidovdan" were exhumed and brought to Sarajevo, where they were buried together beneath the Vidovdan Heroes Chapel