A pyramid?
With a sphyx looking to recover ancient technologies and knowledge?
Hmmm..... honestly real tempted to look at that one, could be swayed otherwise... 

Ice castle physics also fun, ice puzzles? [s]Terrifying mechanic of such places[/s]
Water temple, definitely a fun trip for later too~. Feel like a Captain's hat would a fun cosmetic to buy for those two. 

[img]https://media1.tenor.com/m/gGO8Cx57zDYAAAAd/maomao-apothecary-diaries.gif[/img]

Spooky scary day of hearts coming up! o: