Located just outside of Northwest Tokyo in Saitama, these two lakes are reservoirs for the Tokyo area water system, but the areas around them are wooded rolling hills full of hiking and biking trails. On the north side of the lake sits the Seibu Dome, home of the Seibu Lions baseball team. On warm days, it’s refreshing to walk or bike around the lake and feel the cool breeze blowing off of it while watching the thunderclouds roll in from the west. The old Ome Kaido, an ancient road connecting Yamanashi and Tokyo runs along the south side of the lake and has many historic buildings and shrines along it.