Stopping in Lysekil on a cruise

So you've booked a cruise to visit a number of places that you know nothing about? What led you book that cruise and have you done any research on your own?

It would also be a lot easier to give advice if you told us a bit more about yourself and what you are interested in.

But if anyone else finds this thread in the future, my general advice for Lysekil is Havets hus. It's an aquarium that shows what life is like in Skagerrak in general and in the nearby fjord, Gullmarn, in particular. And if you have the time you can also take the ferry across the fjord to Fiskebäckskil.

I recommend renting a car and driving up the coast for a few hours, if you can find a car rental agency near the port. You could drive up to Fjällbacka, then over to Tanum to see the Viking engravings in the stones (https://en.m.wikipedia.org/wiki/Rock_Carvings_in_Tanum). These places are about 50 km max from Lysekil. You'd be driving on paved country roads with beautiful scenery. Five hours should be enough. You could have lunch in Fjällbacka by the sea. Parking could be a pain in the summer but September is a bit off season here so it shouldn't be an issue.