Looking for recommendations for a one day layover in Madrid. We will not have a car. Thank you
This covers most interests
https://www.timeout.com/madrid/things-to-do/best-things-to-do-in-madrid
The Rick Steves’ Spain book has many recommendations so worth reading. You don’t say what interests you. We spent hours at the Prado and could have spent days but if art is not your thing, well, that would be a poor use of your time. A guide can help you see a lot in the short time you have. See this recent post: https://community.ricksteves.com/travel-forum/spain/best-tour-guide-in-madrid-federico-at-info-spain-fred-com