Of course also the main island it self has a lot of things to offer.
Isla Colon is the heart of Bocas and in the small town you find nice restaurants, bars and shops along the water.
If you want to get away from the people in the town, grab your bike and cycle up to Paunch or Bluff beach.
You cold also rent an ATV and ride through the jungle with it.
In the town you will find small buses that take you during the day to Starfish beach on the other side of the island and you could stop on the way to check out another small bat cave.