A GIANT SAFE behind a portrait filled presumably with jewels and treasures.
A pond. It doesn't necessarily have to be a koi pond or anything, just a small thing in the middle of my garden surrounded by small flat rocks or something. But bonus points if there are turtles and/or frogs that live in it.
A room where the walls are just tanks for sea creatures, including but not limited to:
jellyfish
sea turtles
sharks
A terrace with lots of ivy and vines, preferably with flowers although flowers are...