[Dust in the Wind]

This is the cover of the copy I read.

Ringworld
by Larry Niven

A new place is being built, a world of huge dimensions, encompassing millions of miles, stronger than any planet before it. There is gravity, and with high walls and its proximity to the sun, a livable new planet that is three million times the area of the Earth can be formed. We can start again!

I like this depiction...

The shadows are the night time. The 'details' of it are something I went to dream time with. Imagine Lewis and Clark times millions more in area. I need to finish the trilogy.

[Ransomed]

The rest aren’t as good but still worth reading.

It was a loop of ribbon the size of Earth’s orbit or so and a million miles wide, with 1000 mile high walls on the inner surface edges to hold in the atmosphere as it spins. Pretty cool stuff.

FReegards