Standard Sudoku Rules apply to the final numerical layout.
Skyscrapers: The number in each cell represents the height of the skyscraper built there. The numbers outside the grid indicate how many skyscrapers can be seen looking at the row or column of the city from that location. Taller skyscrapers block the view of shorter skyscrapers behind them.
Skywalks: Connecting some skyscrapers are skywalks, beginning at the circles and traveling along the grey lines. Skywalks begin and end at the same height, and only pass through skyscrapers that are taller.
There are no restraints upon the digits in the skywalks beyond Standard Sudoku. They may repeat, and they do not have to proceed in any given order. They simply must be greater than the digit in the starting and ending circles.
*****
Setter's Diary :: July 26, 2020 :: For this one I'm just doodling around with an idea based on the Skyscrapers. At one point I was going to call it "Tunnels" instead, but that did not produce enough logic or digits to solve it, so I took it above ground and put it in the skyscraper world, allowing me to put digits around the grid that would make it possible. I test-solved it relatively quickly, so I'll estimate 2 stars of difficulty. A bit of fluff for your lunch break.
Solution code: Column 2 and Column 8, in order, top to bottom.
on 3. August 2020, 13:07 by glum_hippo
I had to go slowly, and only found the logic simple in retrospect. I've never been good at skyscraper puzzles but I'm improving! Nice puzzle.
on 26. July 2020, 11:35 by stephane.bura
Nice concept.
Here's an f-puzzles grid I made for it: https://f-puzzles.com/?id=y2z2novc
on 26. July 2020, 05:10 by Willy Wonka
Very enjoyable puzzle! I was expecting a breeze reading your comment although it took me some time to find my way through, a really fun variant!
**** I never know how to rate these. In solving it myself, it seemed straight-forward enough that I imagined everyone breezing right through it. I'm glad you found it the right combination of challenging and enjoyable!
on 26. July 2020, 01:12 by Big Tiger
22 minutes for the first person to find it and solve it. Maybe it's only 1 star, ha ha.