There are / have been horse tramways in the following places in Belgium:
Koksijde is a small village with (today) about 20.000 inhabitants (only 1200 inhabitants around the year 1900). It is situated in the province of West-Vlaanderen, at the most south western side of the coastal line of Belgium, halfway between Nieuwpoort and the French border.
From 1904-07-24 on there was a horse tram line from the village of Koksijde to the beach (Koksijde Bad). It was operated by the "Société anonyme de Coxyde-Plage". It was laid in a narrow gauge.
In 1909 the line was replaced by the steam tram line of the NMVB, which was electrified in 1929.
Unknown to me.