Start with a relaxed breakfast at Fitzbillies - share their famous Chelsea buns and coffee while planning the day's strolls.
Wander through the atmospheric lanes to Great St Mary's Church; climb the tower for a brief, inexpensive panorama over the colleges.
Stroll along the River Cam and watch punts glide by; stop at the Mathematical Bridge for photos and people-watching.
Explore the green spaces of Jesus Green and relax on the riverbank - perfect for a friendly picnic snack or coffee from a nearby café.
Head to the Fitzwilliam Museum for free galleries of art and antiquities; focus on highlights like ancient Egyptian pieces and European paintings.
Grab a light, budget-friendly lunch from Aromi (Sicilian slices and coffee) and find a bench near Parker's Piece to refuel and people-watch with friends.
Head to The Backs for an easy riverside walk behind the colleges; pause for photos of King's College Chapel from the water-side lawns.
Browse the free displays at the Kettle's Yard gallery (check opening hours) and enjoy the peaceful domestic-gallery rooms and sculpture garden.
Stroll through the botanical calm of the Cambridge University Botanic Garden (note: entry is free on occasional days-if free, enjoy the glasshouses; otherwise admire beds and the perimeter paths).
Drop into Mill Road to soak up local life-window-shop independent stores, stop for a tea at Thirsty or a slice at a bakery, and watch the lively street scene.
Return toward the city centre and relax on the grass at Midsummer Common, where you can toast the late afternoon with takeaway drinks and friendly conversation.
Take a gentle twilight walk across Bridge Street toward Scudamore's punt landing and enjoy watching the light fade over the River Cam, perfect for golden-hour photos with friends.
Pop into The Cambridge Blue or The Eagle for a sociable early-evening drink; both pubs have relaxed atmospheres ideal for catching up and people-watching.
Grab casual, affordable street food from the stalls around Market Square or a takeaway pizza at The Sliced (if open) and head to Parker's Piece for an informal picnic as lamps come on.
Join an inexpensive free-entry evening event if available at Cambridge Corn Exchange or check listings for open-mic nights at The Maypole; alternatively, stroll the lit colonnades by King's Parade.
For a relaxed end to the day, walk riverside along Midsummer Common toward the fen edge and enjoy the quieter night-time views back toward the city centre.