Sample British and international street food at Borough Market or enjoy fresh pasta at Padella (expect a short wait). Market stalls typically open from 10:00am.
Visit the Eiffel Tower (towers open ~9:00am–midnight); either picnic on the lawns or ascend for skyline views — pre-book summit tickets to save queues.
Entry to the basilica is free (lines possible); climb the dome for sweeping views (ticketed). Basilica generally open from early morning until early evening.
Pre-book a combined ticket and explore the Colosseum interior and Roman Forum while the light is better and crowds thin; sites typically open 8:30–7:00.