No "The Witness"? Not incredibly challenging, but I very much enjoyed its blend of puzzling and aesthetic.
Personally, I had wanted a new Myst, and The Witness wasn't that, and so I was a bit disappointed. Obduction was released a year or two later and it was similar to the Myst I remember from my childhood and it was also a good game. I strongly recommend it.
That said, The Witness isn't a bad game as such, though the puzzles do get a bit repetitive in my opinion. I prefer more variety rather than hyper focus on one type of puzzles.
Might as well add The Talos Principle then
I find TW to be excruciatingly boring.