try the Philippine cruise or the 7,107 islands cruise!

There are three things you need to know up front before you start making plans to go on a cruise.

1) All of the cruise lines operating out of US ports have a minimum age requirement to book and go on a cruise. For most cruise lines that minimum age is age 21 or older; for Carnival Cruise line its age 25 or older. That means that at least one person in each cabin must be age 21 (or 25) or older to be responsible for any persons under age 21. The ONLY exception to this rule that I have heard of is Disney Cruise Line which will allow persons age 18 or older to book and go on cruises without adult supervision. But you’ll need to check with Disney to verify that this is accurate.

2) All cabins on cruise lines operating out of US ports are sold based on “double occupancy” which means that at least two people will occupy the cabin. However, you can cruise alone in a cabin for a price. You would have to pay what is called a “single supplement” to your fare. The single supplement is essentially a double fare, almost the same as if two people were occupying the cabin. So, for example, if you booked a 7-day cruise in an outside cabin at $500, your single supplement would be about $500 additional for a total of about $1K.

3) If you decide to go while under age 21 on a cruise with anyone other than a parent or guardian, like a friend or cousin, then the cruise lines require written permission in the form of a notarized letter from your parents to go.

So at this point a destination is not the first hurdle you must get over.

Do you realize that the published rates are per person with two traveling together and sharing a cabin? If you travel alone you will be charged about double for the same cabin.
Suggest you visit with a travel agent who can explain the kinds of activities available at the various locations.