If you visit Plymouth, you can see THE Plymouth Rock. While smaller than most people think, it is a part of history, and I think everyone should visit it at least once. It's free to see, right on the waterfront, and about a 2 minute walk from the Mayflower II.

Sundae School has three locations on the cape, all of them a beacon for families on a warm summer night. The lines may be long, but they move quick. The ice cream is fantastic, and worth a trip to get some. This is the Harwich Port location.

Sundae School has three locations on the cape, all of them a beacon for families on a warm summer night. The lines may be long, but they move quick. The ice cream is fantastic, and worth a trip to get some. This is the Dennisport location.

Sundae School has three locations on the cape, all of them a beacon for families on a warm summer night. The lines may be long, but they move quick. The ice cream is fantastic, and worth a trip to get some. This is the East Orleans location

WaterFire’s one hundred sparkling bonfires, the fragrant scent of aromatic wood smoke, the flickering firelight on the arched bridges, the silhouettes of the firetenders passing by the flames, the torch-lit vessels traveling down the river, and the enchanting music from around the world engage all the senses and emotions of those who stroll the paths of Waterplace Park (taken from their website)
You'll need to visit their website to find directions to the parking areas, as well as the dates they run and start times. It runs from Spring to Fall, starting at dusk, on the weekends. If you are in the area, it is something that should not be missed.

This is the original location of Kelly's Roast Beef, right on Revere Beach in MA. The food is fantastic. They have great Roast Beef, as they are known for, but also great clam chowder, seafood, hot dogs and fantastic grilled cheese. If your visiting Revere Beach, or in the area of one of their other locations, make it a point to stop by.