Take one day to sleep in and just be together in the confines of your hotel room or property. Order room service for breakfast and then pick out a movie that you both have been craving to see for a while. Keep in mind that many couples have the tendency to overplan activities during their honeymoon, leaving them exhausted and not in the mood for romance. Plan for at least one day of your trip to just unwind in the comfort of each other's arms.
Little presents each day will be a constant reminder of your love for one another. As for ideas, consider writing a personal message or love note for your spouse and surprise them with it sometime during the day. Get them their favorite bottle of wine, plan an "impromptu" picnic, or buy a meaningful memento. Just remember, it's not about how much the present costs, but rather the thought, meaning, and effort that counts most.
For a most memorable and romantic experience, get up early and watch the sunrise from a unique location. Whether it's a sandy beach or majestic mountaintop, it's moments like these that you'll remember for the rest of your life. Hold hands, share a kiss, and reminisce about all of your new experiences so far together as a married couple.