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A Narrowboat is a long thin boat, designed to fit the canals of England and Wales. They were 7 feet (2.1 metres) wide, and up to 70 feet (21 metres) in length, the maximum that will fit in a standard lock.

In the 18th century before the age of steam railways and the internal combustion engines, the canals were one of the key systems of transporting goods around the country. The boats were towed by a shire horse walking along the tow-path. Of course boats today are powered by diesel engines.

Most narrowboats today are used for holidays & leisure cruising, and some are used as homes.

Read more at wikipedia Link

National Route 1 of the National Cycle Network is a long distance cycle route connecting Dover and the Shetland Islands mainly via the east coast of England and Scotland. The route is all signed and open except between London and Woodbridge (in Suffolk) and between Whitby and Staithes (in Yorkshire).

The Capital Ring is a surprisingly green route that encircles London. Distance is 78miles; it threads together parks and open spaces, mostly following pleasant residential roads in between. The route is an initiative of the London Walking Forum. The route is very well signed, with a Big Ben logo TQ1678 : Three walk logos, Gallows Bridge. The route is a walker’s equivalent of the North and South Circular roads. Link

The Lee Navigation is a canalised river incorporating the River Lea (River Lee). It runs from Hertford Castle Weir to the River Thames at Bow Creek; its first lock is Hertford Lock and its last Bow Locks.
See Wikipedia article: Link

The North London line (NLL) is a railway line which passes through the inner suburbs of west, north-west and north London, between Richmond in the south-west and Stratford in the east, avoiding central London. Its route is a rough semicircle. The line fully opened in 1869.
Wikipedia. Link