The Markfield Sewage Works Site falls within the curtilage of the Lee Valley Regional Park and consists of the remains of the Tottenham and Wood Green sewage treatment works and pumping station. The site was operational for over one hundred years until 1964, when all the incoming sewers were diverted to the extended East Middlesex Works at Deephams.

Major features remaining of the old sewage works include the concrete walls of the original settlement tanks and the filter beds, and the pumping houses . One of these contains the Beam Pumping Engine (Engine House No.2).

It is bounded by the railway track to the north, the Markfield Recreation ground to the south and west, while the River Lee Navigation forms the eastern boundary. The area of the site is approximately 2.5 hectares.

The Engine Houses and the Beam Engine were listed Grade II by English Heritage. The site is also registered as Metropolitan Open Land.

The site also contains an area originally laid out as a community garden, but due to lack of security is now like the rest of the site overgrown and subject to vandalism.