1. Stonehenge and Bath
2. Overview: Begin your journey through time at Stonehenge, the world-renowned prehistoric monument whose enigmatic stone circles have puzzled archaeologists for centuries. A UNESCO World Heritage Site, Stonehenge stands testament to the ingenuity of Neolithic people. Following this mystical encounter, proceed to the elegant Georgian city of Bath, famous for its Roman Baths and honey-hued architecture. Relax in the therapeutic waters or explore the Jane Austen heritage. Rating: 4.8/5
3. Visit Duration: Approximately 4 hours at Stonehenge; 3 hours in Bath

4. Travel Tip: Enjoy a traditional English tea in Bath before returning to London.

5. Oxford and Cotswolds Villages

6. Overview: Immerse yourself in academia and charm as you wander the historic streets and colleges of Oxford, the 'City of Dreaming Spires.' This university town has inspired countless scholars and literary giants. Later, venture into the idyllic Cotswolds, a picturesque region of rolling hills and quaint villages built from golden limestone. Visit Bibury, often described as the most beautiful village in England, and Bourton-on-the-Water, known as the 'Venice of the Cotswolds.' Rating: 4.7/5
7. Visit Duration: 3 hours in Oxford; Full afternoon in the Cotswolds

8. Food Highlight: Try the local pub fare, like fish and chips or a Ploughman’s Lunch.

9. Canterbury Cathedral and Coastal Dover

10. Overview: Discover the spiritual home of Anglicanism at Canterbury Cathedral, a magnificent Gothic masterpiece steeped in history and intrigue. Walk in the footsteps of Chaucer’s pilgrims before heading to Dover, where the iconic White Cliffs stand tall against the English Channel. These cliffs, with their stark beauty, have been a symbol of national pride for centuries. Visit Dover Castle, a medieval fortress that played a crucial role in British history. Rating: 4.6/5
11. Visit Duration: 2 hours at Canterbury Cathedral; 2-3 hours in Dover

12. End the Day: Savor fresh seafood by the seaside in Dover.

13. Windsor Castle and Eton

14. Overview: Explore the largest and oldest occupied castle in the world, Windsor Castle, which serves as a royal residence to this day. Marvel at the State Apartments, Queen Mary’s Dolls’ House, and St George’s Chapel. Afterwards, cross the bridge to Eton, home to one of England's most prestigious public schools, Eton College, founded in 1440. Wander its quaint high street and soak up the academic atmosphere. Rating: 4.7/5
15. Visit Duration: 3-4 hours at Windsor Castle; 1 hour in Eton
16. Don't Miss: The Changing of the Guard ceremony at Windsor Castle (check schedules in advance).

These carefully curated day trips offer a delightful blend of history, culture, and natural beauty, ensuring your time outside of London is nothing short of extraordinary. Each destination promises unique experiences that encapsulate the essence of England's rich heritage and stunning landscapes.