
The picnic line.
The tunnel opened in 1874 on the Balerno branch railway. The train cut the trip from Colinton to Princes Street from an hour on horseback to fifteen minutes, and the line became known as the picnic line.

A Victorian railway tunnel on the Water of Leith path, painted end to end with Scotland's largest historical mural.
Follow the Water of Leith upstream to Colinton and the path dives into the hillside through an old railway tunnel.
Visited and photographed by Simon Hird
Step inside and the dark brick disappears under colour: a winged horse, a Highland cow, a piper among poppies, marching troops, bees and bridges and mill wheels, one scene running into the next along the curving walls.
The pictures tell the story of Colinton and the river valley, its farms and mills, its soldiers and artists, its railway, while painted words in bold letters march along beside them. It takes only a few minutes to walk through, but most people slow right down and stop every few steps. Come on foot or by bike along the river path from Slateford or the village, and carry on to Colinton's cafés and shops, or up into the wooded dell beyond.
Arrives at 5am every day.
A free morning email to see what’s on this week, catch up on what’s happening in Scotland and find somewhere new to go.

The tunnel is on the traffic-free Water of Leith Walkway, National Cycle Network Route 75, just outside Colinton village.
It is free and open at all times.
Been here? Tell others what you know, and the best go on this page with your name.
Add your review
The tunnel opened in 1874 on the Balerno branch railway. The train cut the trip from Colinton to Princes Street from an hour on horseback to fifteen minutes, and the line became known as the picnic line.

Passenger trains stopped in 1943 and the last freight train ran on 4 December 1967. The tunnel was bricked up at both ends and stayed shut for thirteen years.

The mural is built around Robert Louis Stevenson's poem From a Railway Carriage. Its words run along one wall, and the pictures they conjure fill the rest.

Stevenson knew Colinton well: as a boy he often visited his grandfather, the minister of Colinton Church.

Nearly 600 young people from five local schools painted parts of the mural, on marine plywood boards made off-site and fixed to the damp brick so water could run down behind them.

A dark, graffitied underpass has become a destination: the number of people walking through rose from just over 2,000 a week in 2018 to more than 7,500 by 2022.
The last train ran through this Victorian rail tunnel in 1967. Since then it’s been reinvented as a public walkway, decorated within by Scotland’s largest mural – a large-scale artwork of riotous colours.
Read more
New places, news and stories, as we find them.
What is on in EdinburghOn the Water of Leith Walkway at Colinton, in the south-west of Edinburgh.
Craiglockhart HillOne of the Seven Hills of Edinburgh, with two summits, Easter and Wester.2 miles 6 min by road
The Caiy StaneA standing stone about 5,000 years old, in a quiet suburban street.2 miles 6 min by road
SwanstonA small hamlet under the northern slopes of the Pentland Hills.2 miles 7 min by road
The Hermitage BarA traditional Morningside pub with craft beers, ales and whiskies.3 miles 9 min by road
The Canny Man’sA Morningside pub once famous for a curmudgeonly landlord.4 miles 11 min by road
Edinburgh ZooScotland's zoo, opened in 1913.4 miles 13 min by roadPlaces to stay near the tunnel, and when each is next free.
West End Muse
Moment George IV Bridge
Old Town Chambers
The Scott HotelWe want to show you the best that Scotland has to offer. The makers and the creatives, the enduring experiences, the evocative tales, the concealed corners. The roads less travelled that take you to places that matter. The adventures that gather you up and sweep you away. The blend of the wild and the artistic that makes Scotland what it is. We’d love for you to join us.
For further reading, before you go. The details on this page were checked on .