10. Leave the sand alone
The beaches of Hawaii are truly spectacular, and one thing that many travelers decide to do is take a zip-bag of Hawaii’s sand with them. It can be tempting to pocket some green, white, or black sand to show off at home, but it’s a punishable offense that can land you in the detention hall at the airport. Take in the sights of the beaches as much as you want, but leave the sand for other travelers to enjoy as well.