Jellyfish are trouble: They sting, frighten and even shut down nuclear reactors. But they are also really, really pretty. If you agree, and want to get up close and personal with the creatures in a way that goes beyond watching them through the glass of a lit-up aquarium tank, there is but one solution: Head to the Republic of Palau, where you can swim among millions of 6-inch golden jellyfish—without fear—in Jellyfish Lake. The gelatinous invertebrates there have lost there sting, and are too distracted by their daily migration following the sun to worry about getting in your face anyway.
(Very lengthy) flights from JFK to Koror, Palau (with stops in L.A., then Honolulu, then Guam) are $2,556 on Continental in mid-August.