Mukojima Hyakkaen

Mukojima Hyakkaen Gardens (向島百花園), which is a 4-min walk from Tobu Skytree Line Higashi-Mukojima Station, is a stroll garden created by a wealthy merchant in 1804. This site is designated as a Place of Scenic Beauty.
The name of the garden means "the garden in Mukojima with a hundred flowers", though the term "a hundred flowers" here just means "a lot of flowers." Numerous renowned artists flocked here in the Edo period. Unlike stroll gardens created by upper class samurai, there are no elements like large rocks and stone lanterns in this garden.
In 1939, this garden was donated to then Tokyo City (present-day Tokyo Metropolice) and was opened to the public. It was severely damaged in WWII so there's no buildings left which were built before the war.