This is a paid asset, but now you can download Kitbash3D – Treasure Island Free.
Detail this asset from Unity Store: Original Link
Kitbash3D – Treasure Island
CONQUER THE SEVEN SEAS
Make port in a pirate’s paradise with exquisitely detailed wharfs, saloons, markets, battlements, churches, and Spanish-style manors. With its majestic ship that’s sure to shiver the timbers of all those who look upon it, this 3D asset kit is perfect for any creator looking to relive the Golden Age of Pirates.
This is a set of hand-crafted assets, built modularly so that you can customize any structure, with tileable textures that can be used with every model. This set comes with materials pre-built for any render engine, ready to use right out of the box.
Use this kit to create your own 3D world in game engines (Unreal, Unity) or traditional 3D software (Blender, Maya, 3ds Max, C4D, Houdini).