Within an arch, there is a climbing net. Well.. two climbing nets. And neither are perfectly vertical but are rather offset from each other slightly, creating a little gap.
Looks like the mast and a sail of a sailing ship. If the sail was just an outline of metal with a single foot step at the bottom. Attached to a playground. So really nothing like a mast and a sail of a sailing ship. My bad.
Apparently a squiggle pole and another squiggle pole together make a double squiggle ladder. It's got S-shaped squiggles on two planes. Snakes on (two) planes!
A slide consisting of parallel metal tubes set at an incline with additional metal tubes shaped into ovals above. Or a climbing element consisting of parallel metal tubes set at an incline with additional metal tubes shaped into ovals above.