cynth17

Suggestions for a honeymoon mid-August that has great beaches plus activity (hiking, zip lines, snorkeling, touring, etc). I'll go crazy just sitting on a beach!

blamona

Caribbean quite frankly is really about the beach, majority of islands are tiny!

zip lining, try Puerto Rico, Mexico, Costa Rica

You'll find the hilly islands that have zip line are usually terrible for snorkeling, and most islands are small enough that touring really means other beaches.

Touring in Puerto Rico, DR, Mexico

Mexico seems to fit all your criteria

travelerfromtx

You may want to consider St. Croix. You'll find plenty of activities to do there other than the beach, although I don't think zip lining is one of them.

Take a snorkel tour to Buck Island.

Take a tour with Tan Tan Tours for a fun day with some expert four wheeling through the forest.

http://www.stxtantantours.com/

Go kayaking in the bioluminescent bay for a unique experience. It's only available during certain times based on the lunar phase, but you can kayak during the day for a different tour.

http://www.virginkayaktours.com/
http://seathrukayaksvi.com/

Take a horseback ride on the beach and then into the ocean.

http://www.horsebackridingstcroix.com/

Rent stand up paddleboards on one of the beaches in Fredericksted.

Take a Discover Scuba course with one of the dive shops.

There are several different hikes to do, including Jack and Isaac's Bay.

Christiansted has historical places to visit. There is also the Whim Plantation to tour.

http://www.stcroixlandmarks.com/muse...te-whim-museum

Be sure to enjoy a show one night with the Moko Jumbies. We went to the Pirate Buffet at the Renaissance Carambola where we stayed and we enjoyed it very much. The beach is beautiful at the resort so if you don't stay there I would suggest visiting it at least one day.

schmerl

The Riviera Maya area of Mexico has what you are looking for. Ruins to explore, cenotes to snorkel, zip lining, and gorgeous beaches.
Just be aware you are planning to travel during hurricane season in the Caribbean.

CaribbeanBlueBeach

If you would like to have the most incredible Caribbean beaches all to yourselves and still have a lot of fun activities to choose from then Long Island, Bahamas is a great choice. It has miles of breath taking crystal blue and turquoise waters, soft pink and white sand, secluded coves and no crowds so you can enjoy a romantic getaway. It has natural wonders like Deans Blue Hole (deepest blue hole in the world), caves, and stunning coral reefs to snorkel or scuba.

Island activities include: world-class snorkeling, scuba diving, fishing (bone, fly, deep sea, spear), sea kayaking, cave and eco tours, and much more. Guides can take you to reef and fishing hot spots or you can also rent a boat and explore on your own.

This island is easy to get to. The best way is to fly into Nassau, Bahamas and then it’s just a quick hop over to Long Island.

We fell in love with this island and ended up moving here so if it sounds like what you are looking for then we will be happy to send you more info about it.

suze

What you are asking for sounds more like Costa Rica, Mexico, or Hawaii... than any Caribbean island.