Stronghold with End Portal
1.2, 1.3, 1.4, 1.5, Strongholds
This seed will spawn you near to an underground stronghold, with an end portal inside it. It was found by ZachZoom.
(74 votes, average: 3.28 out of 5)
Ultimate Survival Seed
This is the ultimate survival island seed for minecraft, found by Vissers998. It features an underground dungeon, with mob spawner and chest.
(16 votes, average: 3.75 out of 5)