This is the perfect time to travel. You are young, you are healthy and you will most likely never look better in a swimsuit than you do now.
If you are very lucky, your parents will pay for your travels, but if you have to fend for yourself, then there are many programs you can join that allow students to work and travel, all expenses paid.
You might want to take a gap year to travel and experience new things, or you can study abroad.
There are so many options when you are young. It is the perfect time to experience all these things.
Once you are married, you will be tied down and you will have so many responsibilities that make it very hard to experience true freedom.