Fans of the iron horse will love this rail graveyard鈥搇ocomotive museum, with rolling stock, stations, carriages, simulators and years of Japanese rail history in a lovely rural setting. Take the train from Takasaki to Yokokawa Station (楼500, 30 minutes), the end of the Shinetsu main line.
For self-drivers, the park is also within easy reach of Karuizawa (22km).