Stroll 15 minutes along the Thames to Tower Bridge, where you can admire its architecture and optionally visit the Tower Bridge Exhibition (open till 5pm).
Walk 10 minutes to the Tower of London to explore its rich history, the Crown Jewels, and experience a guided Yeoman Warder tour. Open from 9am to 5:30pm.
Visit the iconic dome and interiors of St Paul’s Cathedral. Entry is open until 4:30pm on Saturdays but note last admission is earlier; check ahead to adjust timing or admire from outside.
Take a short tube ride to Sky Garden at 20 Fenchurch Street, free but pre-book your visit slot for sunset or early evening. Enjoy the garden and nighttime cityscape.