Tropical Kingdom MMORPG/Spawn/Hub

Interiors - yes
Version - 1.12.2+
It contains:

• castle
• bank
• clan house (suitable for a store or something similar)
• notice boards
• place for boxes
• many trading stalls and places for NPCs throughout the map
• mage tower with enchantment tables at different levels
• a large port with ships
• blacksmith
• a large building (you can make a casino there or leave it for beauty or your own purposes)
• lighthouse
• mine with ores
• mill
• farm barn
• a field with all kinds of crops
• dungeon entry point
• location for boss fight (or suitable as pvp arena)
• fishing island with a fisherman's house and a small port
• island with forest
• sawmill
  underwater ruins

and much more

important to do:
/gamerule randomTickSpeed 0
/gamerule dofiretick false

file format schematic 1.12.2 and java world 1.12.2, bedrock supported