If you feel like taking a walk in London, head to the Mall.
Built about a century ago as a ceremonial route, the Mall is a wide road stretching east to west from Trafalgar Square and the Admiralty Arch over to Buckingham Palace.
The majority of the Mall runs along St. James Park, and the road is closed to traffic on Sundays and holidays. On these days, you'll find yourself strolling along the path with dozens of others to take a look at the royal palace and have a picnic in the park.
When the Mall is closed for ceremonial occasions, don't expect such quietude — over a million revelers gathered for a look at the royal family for the wedding of Prince William and Cate Middleton in 2011, and again in 2012 for the Queen's Diamond Jubilee.