Already tired of the hot summer sun? Here's the Minecraft 1.12 seed that will help you cool down a bit.
You will spawn right near the grand ice spikes biome and a tundra that accommodates an igloo, which is really well hidden among all the trees. But you will easily find it if you follow coordinates -488 -424.
There is a secret passage under the rug inside the igloo. Open the hatch and go all the way down. At the bottom, you will find a chest that holds a golden apple.