What other rooms are around it?

Bedrooms and an office

What a nice space! A window seat, 2 chairs and a table. Both of these ideas could also include storage, if needed. Example, 2 bookcases and chairs.

How about built-in bookcases flanking window with a built-in bench under window? Or a simple bench and pillows and a tall potted plant like a fiddle leaf fig or something?

Do you have any pain points? Not enough storage? No place to build a puzzle or do sewing projects? Space for a dog kennel? Reading room? Study for your kids to do homework? Upstairs laundry?

Without knowing your needs it is hard to anticipate the best use for this space.

A reading nook or a small home office might work here. Here are some visuals to help you figure out what you'd like in that space.

Walking Stick Overlook: Home Office · More Info

Wieuca Road · More Info

Sophisticated Master Suite · More Info