Start at the train station in Ry, and follows the official,  marked trail around the laves, until right after Himmelbjerget,  where it ends at a parking lot

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Himmelbjergruten - Naturstyrelsen 

The Watercress Way’s 44 km/27 mile circular trail, NE of Winchester, Hampshire is waymarked for walkers and runners.

https://www.thewatercressway.org.uk/

It follows parts of two Victorian railway lines closed mid C.20th, linked by historic livestock droves and crosses beautiful rolling chalk downland and parts of the rivers Itchen, Arle and Dever. Both old railways were important in starting the Victorian boom in watercress production, hence the name of the trail.