What is "chalkwell"

Chalkwell is an area in the Southend-on-Sea borough and unitary district in Essex, England. It forms part of the built-up area of Southend-on-Sea and is included in the Westcliff-on-Sea post town.

The Crow Stone, which stands on the mud on the estuary foreshore opposite the end of Chalkwell Avenue, marks the limit of the Port of London Authority's jurisdiction. It was erected in 1837 and replaced a smaller stone, dating from 1755. The older stone was removed to Priory Park in Southend where it remains today. The line, known as the Yantlet Line, between the Crow Stone and the London Stone, Yantlet Creek, almost due south on the other bank of the Thames is used as the eastern boundary of the jurisdiction of the Port of London Authority.

In 2009 an open water swimming club, the "Chalkwell Redcaps" was established and has quickly grown to be one of the UK's largest open water swimming groups. The Crow Stone is used as an assembly point for some of their swims.

Chalkwell railway station is located here.