Start with a walking tour of the Westminster area, where your tour guide will escort you to 20 different famous sites. Head through Green Park to Buckingham Palace, admiring the well-manicured trees and flowers along the way. At the palace, watch the world-famous Changing of the guard Ceremony. Afterward, your tour continues as you see 17 other iconic London sights such as Downing Street, Westminster Abbey, Big Ben, and the Houses of Parliament. After your walking tour, hop onto a cruise down the River Thames. Enjoy the calm of a cruise,  as you see London landmarks from the vantage point of the river. Marvel at the London Bridge, the Houses of Parliament, London Eye, St Paul's Cathedral, the Shard, Tate Modern, the Tower of London as you gently roll down the river.