i don’t know if this is rare but i’ve had a woodland mansion spawn with most of it underground before; one of the rooms was completely destroyed because of lava from the cave
Me and my friend had a ocean temple in a big hole full of water in the middle of a huge frozen biome on one of our servers, it was partly under the ground, wich floated on half the water and the hole of water was not deep at all, so it made exploring the temple super easy
I'm into the Brazilian band 'Crypta', and so I tried their name as a seed: you spawn directly in front of a village with a Weaponsmith that has 4 iron, 10 obsidian, a saddle, and some apples in their chest.