A sandcastle is your home on top of a multi-level waterfall tower. The home has a stove that can cook things. Also has a computer and a bed. Has a lounge chair just outside that watches the sun and moon.
The giant tower has a ladder that goes through all the levels that are stone and water partial caves. They are lit by glowberries.
On the bottom level is a large sandstone village with people and cats. It has a protective roof, so the water does not wash through it. Thier is a boat tied up on a dock. Thier are many nearby biomes that are easily accessible. You can see them from the top very well.