Slaughterhouse

 This must be the Slaughterhouse. 

The Slaughterhouse is where the People killed 

all sorts of Cows, Pigs, Sheep and Chickens to make them as Meats. 

The Slaughterhouse was really a horrible Place to me.
I can imagine if Madame Pica hung the dead Picas' Bodies on Hooks 

in the Pica Towers in order to feed them to her scary Freaks. 

But in "Jojo in the Stars" Madame Pica didn't hang these dead Picas on Hooks 

while Hero was looking for Jojo. 
Pica Towers means Madame Pica's Slaughterhouse a little bit.