Hop aboard your comfortable, air-conditioned minivan in central London and journey west into the English countryside to begin your tour.
As you travel, listen as your guide talks of the region’s long history, and hear fascinating facts about your first destination: the UNESCO-listed stone circle at Stonehenge. On arrival, head inside (additional cost) to stroll around the site and visitor center independently. View the gigantic, prehistoric monument, believed by most scholars to have formed a temple aligned to the sun; and explore the archaeological and audio-visual displays at the state-of-the-art center.
Back aboard your minivan, continue to Runnymede, the historical site of the sealing of the Magna Carta — the document that laid the foundations for modern democracy — by King John in 1215. Take in the views of the rural site beside the Thames River and see the imposing nearby Royal Air Forces Memorial.
Next, travel through glorious Windsor Great Park to the royal town of Windsor, prettily situated on the banks of the Thames. Here, stop to visit magnificent Windsor Castle (additional cost), still used as a weekend residence by Her Majesty Queen Elizabeth II.
Admire the opulent State Apartments, with their richly decorated halls and chambers, and depending on the day, watch the Changing of the Guard — a centuries-old ceremony that takes place at the 1,000-year-old castle on select dates.
Alternatively, follow your castle visit with a stroll along the Windsor and Eton Heritage Trail, a waymarked route that circles the castle walls and traces the Thames' banks. Or, if it's between April and October, perhaps enjoy a boat trip (additional cost) along the Thames to admire stellar views of Windsor Castle, Eton College and other landmarks.
When the time comes, leave Windsor by minivan and end your day trip at the start point in central London.