Seed Code: -1903150525
Spawn in Jungle Biome. There is a Desert Biome right next to spawn with a Temple at (x 138 y 63 Z 344) There is also a surface Spawner which also leads to a cave system at (x -72 y 60 z 209) However there really isn't any good loot in either except for some Iron in the Temple. If you continue south from the temple and you'll come to another Jungle with a ravine and exposed abandoned mine-shaft (x 93 y 65 z 691) On the way there you'll pass an extreme hills biome with a lot of openings some of which lead to cave systems.
X: 221 / Y: 68 / Z: 165
X: 93 / Y: 65 / Z: 691
A ravine with an abandoned mine-shaft inside.
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