Unknown civilization island (pyramids, volcano, mountains, rivers, waterfalls, etc. + challenges)

• A huge volcano
  
• Huge mountain complex (try to find the secret cave, there's 2 chests with goodies but beware of the mobs!)
  
  
• 2 waterfalls coming out of a mountain
  
• There's a secret treasure inside the waterfall! (try to find it)
  
• Mossy mountain complex (inside one of the mountains is a cave with nice stuff)
  
• Pyramid complex (under 1 pyramid is a chest with goodies but some mobs will try to protect it)
  
• Lagoon with hills around it
  
• Beaches, seasonal forests, caverns and more!
  
  
• No snow biomes, so the water won't freeze!
  

Additional Notes

• find all chests from all 6 caves
  
• find the treasure inside the waterfall
  
• get the gold from the top of the 3rd pyramid
  
• connect with bridges all mossy mountains
  
• build a house
  
  
• make a big SOS on the beach out of gold blocks
  
• do all this WITHOUT using creative, any mods or x-ray texture packs.