One museum you can visit in Arno is the Arno Atoll Museum, which features exhibits on the history and culture of the Marshall Islands. If you're looking for other museums nearby, you may want to visit the Alele Museum and Library or the Marshall Islands Resort Museum, both located on Majuro Atoll, which is about 320 kilometers south of Arno.
One popular dish in the Marshall Islands is "poke," which is a salad made with raw fish, usually tuna, mixed with onions, coconut milk, and other seasonings. Another local favorite is "kadon pika," a spicy chicken dish cooked with coconut milk, chili peppers, onions, and other ingredients. Other common dishes include "umu," which is a traditional feast that typically includes roasted pork, fish, and vegetables cooked in an underground oven; and "kakamwur," which is a dessert made with grated coconut, sugar, and pandanus leaves.
Some fun activities that local people enjoy in Arno include fishing, snorkeling, and swimming in the lagoon. You can also take a boat tour to explore the atoll's islands and beaches, or visit one of the local schools to meet with students and learn about Marshallese culture and traditions. Additionally, you may want to attend a traditional dance performance or participate in a lei-making workshop to experience the unique cultural practices of the Marshall Islands.