The typical hop-on, hop-off sightseeing bus is a great way to spend the day on your first trip to London. The ‘Old Smoke’ is such a large city, you can get your bearings and tick off some of the famous sights you feel you can’t miss. But London’s size also means that there is so much dwelling beneath that tourist-friendly surface. As Samuel Johnson rightly said, ‘He who is tired of London is tired of life,’ and you could honestly spend years in the British capital and still never run out of new things to see and do. So once you’ve satisfied your tourist tooth, try one of these more unique London day tours on for size.