Here is a Big Island website with so many recommendations and must see destinations on Big Island!
Check out the active volcano Kīlauea that was just erupting in December! There are many different hikes that range from easy to difficult.
One of the best beaches for snorkeling and it's famous for its Honu (green sea turtles).
Considered one of the best beaches on Big Island!
One of the most famous black sand beaches in Hawaii.
Another great place for snorkeling! There is also a great trail for hiking that overlooks the ocean!
Daytime and nighttime guided snorkeling tours
You have to try shave ice atleast once in Hawaii!