Start your day with a visit to the famous residence of the British monarchs. Witness the Changing of the Guard ceremony at 11 am, free of charge, before taking a walk around the palace's stunning gardens.
The British Museum houses a vast collection of human history, art, and culture from all around the world. Entrance to this museum is free, although some exhibits require paid entry.
Take a stroll through the scenic Greenwich Park and enjoy the views of the River Thames and the city skyline. Catch a glimpse of the Prime Meridian Line, the line that divides the eastern and western hemispheres of the earth, at the Royal Observatory located within the park.
One of London's largest and most diverse markets, Camden Market offers an eclectic mix of street food, vintage clothing, and unique crafts. You can enjoy browsing and people-watching here without spending a penny, but make sure to have some cash in hand for the tempting food options.
London has an extensive and convenient public transportation system, consisting of the underground, buses, trams, and trains. Plan your journey beforehand with a travel app like Citymapper or Google Maps to save time and avoid getting lost. A 1-day travelcard will cost around £6.90, giving you unlimited travel on buses and the underground.
If you have more time, you can visit other free attractions like the Tate Modern or the National Gallery. If you have less time, you can choose to skip a location or two on this itinerary, depending on your interests.
London's main airport is Heathrow Airport (LHR), located around 14 miles west of the city center. Other airports include Gatwick Airport (LGW), Stansted Airport (STN), Luton Airport (LTN), and London City Airport (LCY).