If you just want the beach and the sea, the Maldives is okay, but that would be too boring.
It is recommended to go to Hawaii. Don’t just think that Hawaii only has the sea. The most famous active volcano in the world is in Hawaii. It erupted not long ago. It will be very interesting to take a helicopter and hike. There is also a view from the volcano. Star, driving on the road to heaven - the Road to Hana will definitely make your trip colorful. You can take a look: web link