Hakone Open-Air Museum

Japan's first open-air art museum spreads across a lush hillside, displaying over 120 sculptures by masters like Henry Moore, Auguste Rodin, and Taro Okamoto against a backdrop of forested mountains and steaming volcanic terrain. Opened in 1969, the museum blends nature and art in a way that feels effortless — winding paths lead past monumental bronze figures, playful installations, and a stunning multi-story tower encrusted with Chihuly glass.

Indoors, the Picasso Pavilion houses over 300 works spanning the artist's career. Children will love the interactive net sculpture and crocheted playground, while adults can soak in the museum's own foot bath fed by natural hot springs — a perfect reward after exploring the sprawling grounds.