The Changing of the Guard ceremony, a highlight of this tour, has a rich history dating back to 1660, when Charles II formed the Household Troops. This tradition evolved from the need to protect the sovereign and now serves as a formal handover of duties between the Old Guard and the New Guard. The regiments involved, typically the Foot Guards in their iconic red tunics and bearskin hats, boast centuries of service to the Crown. Buckingham Palace, the primary venue for the ceremony, became the official royal residence in London in 1837 during Queen Victoria's reign. Prior to this, it was Buckingham House, built for the Duke of Buckingham in 1703. The Thames River has been London's lifeblood for millennia, serving as a trade route, a defensive barrier, and a source of inspiration. From Roman times, it facilitated the city's growth, connecting it to the world. A cruise along its waters allows reflection on this profound historical connection, tracing the city's evolution from a small settlement to a global metropolis.