During the World War II (or maybe before) people haven't had the refrigerator to make ice cubes. They had to buy the ice blocks (about 1 meter long) and this was where they bought them.

They built some more shacks like this one in several places around Jakarta and kept the ice blocks there. The walls were layered by sawdust and zinc to keep the temperature low inside the building.

This is a rare info I got from my Dad, not everyone passing this old shack know what its use was for. I'm glad my Dad shared some history with me, although it's just a bit.. And now I'm sharing this with you.