If you'd love to add a bit of extra culture to your getaway, put Arakawa Museum of Aqua on your list. Check for guided tours or just browse around at your own speed.
Located in Kita, this museum is well worth a visit. But you'll find loads more to see and do in the area. Sensō-ji Temple, Tokyo Dome, and Ueno Park aren't too far from Arakawa Museum of Aqua.