The Hertford Union Canal is a short canal (about 1.5 km long) that stretches through Tower Hamlets in East London. It connects the Lee Navigation to the Regent's Canal (and then onto the Thames). The canal was built in 1830 but was not a commercial success and ended up being bought by the Regents Canal Company.
The Hertford Union Canal is a short straight canal with 3 locks. At it's Eastern end the junction with the Lee Navigation is now overlooked by the Olympic stadium.
The other end of the canal connects to the Regent's Canal by Old Fort Lock.
Although not a long canal the Hertford Union Canal is an interesting walk though a much changing part of London.