How to find the End portal (stronghold) in Minecraft
The portal room has 12 End Portal Frames over a lava pool and a staircase with a silverfish Monster Spawner.

The End Portal Frame is the green-and-yellow frame block of the stronghold portal room.
It gives off light level 1. It cannot be broken in Survival.
Twelve of them form a ring around the portal; some already hold an eye. Place an Eye of Ender in each empty frame to open the portal. Frames cannot be broken in survival and resist any explosion.
This item has no crafting recipe.
The portal room has 12 End Portal Frames over a lava pool and a staircase with a silverfish Monster Spawner.
| eye | true · false |
|---|---|
| facing | north · south · west · east |
It holds eyes of ender to open the End portal. Works with: Eye of Ender.
Not in Survival: its hardness is -1, so no tool can mine it. Its blast resistance (3,600,000) also stops explosions.
Yes, light level 1.
Placed under a Note Block, End Portal Frame gives the Bass drum sound.