The tunnel between East Finchley and Morden (via Bank) is the Underground's longest and one of the longest rail tunnels in the world, 27.8km (17.25 miles). However, Morden is covered by a canopy and is therefore tru to your question but East Finchley is not. The previous station to East Finchley is Highgate, approximately 1200 metres from East Finchley.
It is the central line. it has alot of stations
longest distance between gas stations la to lasvagas
Angel station, on the Northern line, has the longest escalator on the underground network, at 197ft, in two flights.
At mt. Vernon.
johnny Scott
Wans't Elizabeth Fritzl held underground for 24 years??
78 meters
Kallang-Paya Lebar Expressway (KPE) in Singapore with about 8.5 kilometres underground.
All of them are under downtown London.
There is no legal maximum length. There is a practical maximum, dictated by the length of the stations for passenger stations, and the length of goods yards for goods trains.
You can find it in Hartland New Brunswick
Stockholm's Metro, located underground.