To its west flows the River Brent, which marks Hanwell's boundary with Southall. There are several green spaces including Brent Valley Park, Elthorne Park and Cuckoo Park; meanwhile, the Hanwell Zoo is a popular local attraction featuring small mammals, birds and other wildlife. Its elevation is approximately . The town holds its own annual Hanwell Carnival, London's oldest carnival.
To its west flows the River Brent, which marks Hanwell's boundary with Southall. There are several green spaces including Brent Valley Park, Elthorne Park and Cuckoo Park; meanwhile, the Hanwell Zoo is a popular local attraction featuring small mammals, birds and other wildlife. Its elevation is approximately  The town holds its own annual Hanwell Carnival, London's oldest carnival.