St Petrus & Paulus Church, Oostende
Since the church looms above the cityscape when you exit the train station, you can't really call the Saint Peter and Paul Church "off the beaten path", and yet somehow it is. It's easy to disregard architectural wonders and cultural sights in a beachfront town, even when they're staring you in the face. The church is nice, but it's easy to overlook -- Oostende doesn't have the glorious architecture of Brugge, Gent, Antwerpen, Leuven, or Brussels. That's not Oostende's bag, but the few gems it has are worth investigating.