Lie back on the cool grass and soak up the lovely surroundings at Higashishirahige Park. After a long day exploring the sights, it's the ideal place to take a breather.
When you've finished exploring this Sumida recreation and green space, why not check out Tokyo Skytree, Tokyo Imperial Palace, and Sensō-ji Temple? They're not very far from Higashishirahige Park and also a hit with travelers.