Located in the North of Luxembourg, the medieval market town of Esch-sur-Sûre is nearly completely surrounded by a natural moat of the river Sûre.

A couple of miles further upstream from Esch-sur-Sûre is the country's drinking water reservoir, where a barrage dam makes a fine lake, used for water-sports of all sorts (except those using engines of any type ... drinking water!)
More pictures at: www.luxembourg.co.uk/esch.html