Minecraft wiki entry for Nether_portal, associated text: A zombified piglin wandered through a nether portal and into the Overworld.
A view of inside a portal.
The biggest nether portal size (23×23 exterior, 21×21 opening).
Nether portal generated on a cliff in crimson forest.
A cluster of nether portal frames generated by repeatedly going through the Nether-side portal, deactivating the Overworld-side portal and teleporting back to the Nether.
Official artwork featuring a nether portal.
Official artwork featuring a nether portal.
Official artwork featuring a nether portal.
Official artwork featuring a nether portal.