Located northeast of one of the world's most famous capital cities sits the renowned Stansted airport. Seeing approximately 17.5 million passengers pass through its doors each year makes this one of the UK's busiest airports. If you hire a car from London Stansted airport you can take the short journey to Mountfitchet Castle, an open-air museum where visitors can travel back almost 900 years and explore what life was really like. If you are travelling with children, or just have an interest in toys, House on the Hill Toy Museum may be worth a visit as it houses hundreds of rare and vintage toys.