Bamboo generated in caves below jungle hills biome.

• I found bamboo inside a giant cave at Y level 10. It's planted above gravel and in jungle_hills biome.  Also another one at Y level 2 planted over dirt.                                      coords(88 12 439) (118 2 450)
• Also I found a lapis lazuli ore at Y level 52 inside a aquifer just below a zombie village at spawn.
  coords 158 55 454

 

• seed: 8433902526619557614