The Grounded sun sculpture in Bogovićeva street can be the starting point of a great solar system adventure. You can find all other planets, Pluto included, on various locations throughout Zagreb, and their distance from the Grounded sun is proportional to their real distance from the Sun.
Here’s a cheat sheet of where the other planets are located:
Sun Bogovićeva 3,
Venus-Ban Jelačić square 3,
Neptune-Kozari, II odvojak 17,
Pluto-underpass at intersestion of Aleja Bologne and Škorpnikova.