Where: Walthamstow Wetlands
This large nature reserve in Walthamstow only opened to the public in 2017, so it's still a relatively un-explored location for many Londoners.
The 211-hectare site has been created around ten reservoirs built in the Victorian era that continue to provide drinking water to the capital. It's also home to the largest fishery in London, and is an important location for migrating birds and other wildlife, making it a site of importance for nature conservation.
Free to visit, there is a Victorian-era engine house with a visitor centre and café, shop, interactive displays, viewing platform, and art installations. Once you're done soaking up local nature and history you're merely a hop and a skip away from Blackhorse Beer Mile, where you can wander from one brewery to another to sample the local beers.