As you carry on along the A838 between Sangomore and Sangobeg you will see signs to Smoo Cave. This huge, mixed sea and freshwater limestone sea cavern is the largest sea cavern entrance in Britain. The cavern can be explored to an extent on foot and in the summer boat tours take explorers further in.
Carry on towards Kyle of Tongue, a deep sea loch with Ben Hope and Ben Loyal bearing down. Tongue Bay is home to three small islands which are enjoyed by kayakers and divers as well as being great spots to enjoy a wander and picnic.
Now you can make a choice; turn south on the A836 and meander back to Edinburgh enjoying the scenery (6+ hours), or stay north hugging the coast and enjoy the dramatic cliffs and sea views (see Caithness and East Sutherland).