This Roman inspired church (see third picture) has its looks from the 1880s but parts of it are much older and this is at least the third church on the site. Not much is known about the first one, but one of its two main towers today is the remain of the Roman 13th century church which otherwise had to be demolished for safety reasons. The church has a lovely setting on a hill in the middle of the village and, during my visit for a wedding, there were no less than three weddings the same day so it is popular with the locals.
The best thing in Windeck is to have your own car. Failing that, there are some trains to Dattenfeld but not that many as it is a very small station. Most instead stop in the slightly bigger "capital of Windeck" called Schladern which is where you will find frequent enough connections to Cologne (around an hour's travel time along the river).
Favorite thing: Just to go for a walk around the village will reward you with some nice half timbered houses and turning a corner might well give you lovely views of the surrounding hills.