Boat Curiosity Sol 2017 Returned April 9, 2018.
.Boat Curiosity Sol 2162 Sept. 5, 2018.
As well as a boat this image by the Curiosity Mars Rover, Sol 995 May 25, 2015 has a mysterious leaning tower upper right center!
There appears to be a jumbled mass of boats in this Spirit Rover frame taken in 2009.
This craft from Curiosity Sol 782 returned Oct. 18, 2014, looks like a cable ferry. Gigapan 164598.
Boat - Curiosity Mars Rover Sol 1284, March 17, 2016, Gigapan 185800.
Looks like a couple more water craft on Curiosity Sol 1255.
Another one at Curiosity Sol 51.
https://mars.nasa.gov/msl/multimedia...7&end_sol=1907 Boat Curiosity Sol 1907.
A boat and a stone axe in this image returned from planet Venus by the Venera 13 Lander in March 1982, as with the Martian artifacts there appears to be square chisel marks on the stone implement, while the Venusian boat appears to be of the same Lilliputian dimensions as the Martian boat of Curiosity Sol 782 inset upper right.