This island spent a few decades being completely uninhabitable before opening back up to a few caretakers. It was the site of multiple nuclear tests, and thus holds historical significance. It also floods due to rising sea levels that contaminate the well water supply. You won't be visiting any time soon, but it does exist!
Arno Beachcomber Lodge Beach is located on the island of Arno in the Marshall Islands. The beach stretches over 2 km with soft white sand and crystal clear waters perfect for swimming, snorkeling, and sunbathing.