Leeds Castle Private Viewing, Canterbury and Greenwich Day Trip from London. Legendary churches, UNESCO World Heritage sites and other grand and famous landmarks await you on this day trip from London. Discover Leeds Castle before it opens to the public during a private, guided visit; snap photos of the striking White Cliffs of Dover; tour Canterbury Cathedral, immortalized by Geoffrey Chaucer in ‘The Canterbury Tales;’ explore the beautiful, royal London borough of Greenwich; and take in London’s world-famous sights on a sunset cruise along the Thames River. Book this Trip and Save 10%! Leeds Castle Private Viewing, Canterbury and Greenwich Day Trip from London.