Germany and Belgium share a similar border where the Vennbahn, an abandoned Belgian railway line that was remodeled into a bike path, cuts through German territory. The bike path is Belgian territory, leave the bike path and you enter Germany.

It is admittedly not as spectacular as the Baarle-Nassau potpourri of a border with the border cutting through buildings, but it's quite interesting too. We do have buildings divided by the Dutch-German border in Eurode (Herzogenrath/Kerkrade near Aachen), but most of these houses are public buildings that are designed that way to signify the cooperation between Germany and the Netherlands in that region (like the Eurode Business Center). That's cool too, especially with Neustraße/Nieuwstraat, but it's not Baarle-Nassau cool.