Historic Fortress by the Danube River in Passau, Germany

Perched atop a rocky outcrop overlooking the confluence of three rivers—the Inn, the Ilz, and the Danube—this imposing fortress is known as Veste Lower House (Untere Burg) in Passau, Germany. Its formidable stone walls have seen centuries pass under its watchful gaze while offering panoramic views across the city and river landscape below. A blend of medieval architecture with later additions, it stands proudly amidst lush greenery that softens its historic silhouette against the vivid blue sky dotted with wispy clouds.