While finding the Hokubu Treasure Hunt is undoubtedly the harder of the exploration challenges this week in Forza Horizon 6, locating Hirosaki Castle isn't easy either. It doesn't help that the cold front has come in and covered the whole map in a blanket of snow. So, here's what you need to do.Forza Horizon 6 Hirosaki Castle locationXboxXboxYou can find Hirosaki Castle in the northeast of the Takashiro region, not far from the eastern edge of the map. Look for the Hirosaki Castle speed trap event at the centre of the area, as this will place you right out at the castle's gates, though the Hirosaki Scramble dirt race is nearby too. Plus, since it's a tourist site, it's a marked, named location on your map.To complete the Classy Castle photo challenge specifically, you need to take a photo of any classic sports car outside the castle. This includes cars like the Mazda RX-3, Chevrolet Corvette, and Nissan Skyline 2000GT-R Barn Find. Chances are you've already got something that fits the bill, so go to your garage and filter it by classic sports cars and take your pick.For your hard work as a car photographer, you'll earn two Festival Playlist points and the White Suit clothing item, so not all too exciting. Thankfully, those points will at least get you one step closer to this week's reward cars—the 1982 Lancia 037 Stradale and the 2020 Ferrari Roma—and the Series' milestone rewards—the 2024 Lamborghini Temerario and the 2022 Ferrari 296 GTB.Forza Horizon 6 car list: All the rides you can collect.Forza Horizon 6 best cars: What to buy and tune.Forza Horizon 6 Treasure Cars: Skip the clues.Forza Horizon 6 Barn Finds: Track down these relics.Forza Horizon 6 review: What we think.