This photo was taken in a place, where you can have the best view on the two most famous icons in Prague, the Charles bridge and the Prage Castle.
Fun fact #1: did you know, that the Charles Bridge was founded in 1357, september 7th, at 5:31 am? A number palindrome 135797531. Here´s a little more explanation: https://en.wikipedia.org/wiki/Charles_Bridge
Fun fact #2: the Prague Castle is the biggest castle complex in the world :) https://en.wikipedia.org/wiki/World%27s_largest_palace
And where to take this photo?