If you are staying in Kotor or Kotor Bay more than 2 days then there are loads more to explore.
Boka Bay Boat Trip
This 8 hour tour starts from Kotor, Herceg Novi, Budva or Tivat. You have a visit to Bijela where you can have a swim, then sail through Mamula Island, arrive in Blue Cave 2 hours after the disembark, have a swim break in the Blue Cave about half an hour, head to Dobrec beach, after lunch to the submarine tunnels, then to Our Lady of the Rocks for one hour and then return to Kotor by 6pm.
Perast, Budva and Kotor Tour
This tour includes a visit to the most popular coastal towns in the Bay of Kotor. You’ll be seeing Perast and Our Lady of the Rocks, Budva City, and Budva Old Town and Kotor City and Kotor Old Town. This 6 hour tour starts from Kotor and includes transportation and local tour guide.