If you want to add some extra culture to your escape, put Sendai City Jomon Site Park on your to-do list. See if guided tours are available or just roam around at your own pace.
This museum is located in Taihaku Ward, a place that has plenty of things going for it! Tohoku Gakuin University Tsuchitoi Campus, Sendai Anpanman Children's Museum & Mall, and Sendai International Center are other worthwhile sightseeing opportunities not far away when you're done at Sendai City Jomon Site Park.