The Den or 'New Den' is the home of Milwall, a third divison football team base in Bermondsey, South-East London. Their team nickname is The Lions, previously, The Dockers. They changed the nickname after being referred to as "Lions" for their acts of giant killing in their FA Cup run of 1900, when they reached the semi final.

Millwall has a reputation for being one of the toughest football grounds in the country with die-hard fans.