We board the Grand Safari for an 8-hour cruise on the Mediterranean Sea leaving out of Kaş. This is a file photo from their website - but our cruise was fairly uncrowded just as this photo shows (it's the early season still).
We'd go from left to right (and back) in below map hitting various coves, a ruined Roman port town, an underwater ancient city, and go to shore in a village with a high castle (we didn't do the Blue Cave in lower left however - I think our boat is too big for it).
We hung out with the youngins on the top deck on the lounge chairs.
Leaving port now...
...and soon seeing some ancient Roman leave behinds (the ruins of an ancient Roman port town).
We "smoked" this guy, our boat is a wee bit faster.
It was fun watching the scenery roll by at 12 mph from our "pool side" chairs.
Next stop, a lagoon...some intrepid passengers took a dip here, where the water is chilly and there's a bit of a current.

Other classic yachts out and about...
Now on to the sunken city...
"The surviving remains above the waterline at Dolichiste consists of moles, quays, rock-cut and stone-built buildings, water channels, staircases, pipes, and sarcophagi, while beneath the waves are numerous foundations, rock-cut staircases, rock-cut water channels, terracotta pipes, and a series of 5th to 7th century AD amphorae piles.
The city was gradually abandoned by the 7th–8th century AD, indicated by the lack of medieval remains post the Byzantine period. Natural disasters such as earthquakes, tectonic movement (earthquakes dropping parts of the city below the waterline), and plague in the 6th century AD, and conflicts between the Arabs and Byzantines in the 7th century AD left the region unprotected, and that culminated in the city likely being abandoned."
Now we cross a channel and get to go ashore at Simena...
...and scramble up to the high castle overhead (our boat is the left-most one down below).
High and dry sarcophaguses and a now wet one, due to the lowering of the land in this area from tectonics.
Theater with seating for 300, supposedly.
Heading back down to the boat, we try a scoop of the goat-milk ice cream - not too shabby.
Back aboard our boat, and looking up at the high castle...
And then onto another cove...
...Gerri wonders what's around the bend - as it turns out nothing.
Farewell Kaş boat tour!