Howdy,
We have a Formula 1 track in Austin called Circuit of the Americas and on many Tuesdays they have a bike night. Last night was the first one of the season.
The track is about a 3.36 mile loop with 1 very steep (11%) uphill (and corresponding steep downhill). The pavement is so smooth and free of debris, in certain places it makes a satisfying sticky-grippy sound as the tires roll. There is a bypass for the big hill if one does not want to do it every lap.
Aside from the novelty of riding on an F1 race track, the really special thing about it is it's just nice to ride somewhere without having a single thought about cars or having to stop for any reason. There's so much space. Everyone can ride at the pace they want. There are some really fun slight descent sections that are a blast to pedal hard and get going really fast under my own power (i.e. not just hill induced). Or just toodle around with your legs outstretched singing out loud.
I brought my 57 Roadini and had a lovely time. This time was neat because my friend brought his 8-year-old twins who'd never been before. I was impressed they did the big downhill (I wouldn't have been brave enough at that age.)
Definitely worth checking out if you're within striking range of Austin, especially before it gets too hot.
Mike
https://circuitoftheamericas.com/bike-night/