The village of Husseren-les-Châteaux is a peculiar one: at 1.2 km², it is the smallest commune in Southern Alsace, totally surrounded by Éguisheim. Beyond the vineyards, in the hills above the village and on the border with Éguisheim, are three castles, separated by... nothing.
Unlike other places where several castles can be found, such as Andlau or Ribeauvillé, this was only one unit, with the Dagsbourg and Weckmund being extensions of the original Wahlenbourg in the middle. Each section had its own dungeon.
I visited with my sister on a very overcast day two years ago, with low cloud descending on the hills. It made for some moody shots. We weren't alone up there - which was probably helpful! Also we used a car, and the car park isn't far, so it wasn't a creepy hike up or down.
As for the castle itself, it was destroyed during the Six Deniers War in 1466. The Habsburgs intended to conquer Mulhouse, and used the flimsy pretext of a miller being owed six deniers to start the invasion. But Mulhouse found allies in neighbouring Swiss cantons (before the Swiss Confederation was a thing) and won, taking out the fortress of Éguisheim along the way... as well as the miller whose complaint gave the Habsburgs the excuse they were waiting for.
Just a few kilometres to the South-West of Colmar is the village of Éguisheim, with a preserved Medieval centre, featuring gorgeous timber-framed houses. Some of these are the daintiest, slimmest houses you can find!
It begs the questions "why?" and "how did people live in them?" Well, in some places with similar thin houses, taxes have been the reason, as residences were taxed based on how far they extended on the street, with few restrictions on height and depth. Heck, here's an example in Colmar that doesn't have any footprint on the street: the Muckekaschtele, or "fly box house". It has a surface of 25 m², but it wasn't originally used as a home - it was a watchtower to make sure people were paying customs when bringing goods to market.
I'm not sure if that's what's at play in Éguisheim, it just looks like they're making the most of the space available between streets. In any case, they're charming and eanred Éguisheim the title of "France's Favourite Village", a poll organised by public TV channel France 2, in 2013. Éguisheim's more historic claim to fame is having been the birth place of Pope Leo IX (reigned 1049-1054).