Sky Garden, Walkie Talkie, City of London

Next, let's move on to something completely different: Sky Garden is a stunning contemporary version of the city garden. This remarkable green space, which is perched on the third floor of the City of London's famed "Walkie Talkie" skyscraper, is frequently included on lists of the best free things to do in London.

The Sky Garden offers 360-degree views across the city from London's highest public garden. This is London sightseeing on a whole new level. The Shard, HMS Belfast, More London, Tower Bridge, boats on the Thames, red double-deckers, and people crossing London Bridge, the golden pinnacle of The Monument, down onto rooftops, Battersea Power Station…so many London points of interest. Spend the time here to enjoy the landscaped gardens, observation decks, an open-air terrace and multiple options for food and drink. The visually appealing Sky Garden, which is located on floors 34 to 37 of this distinctively curved skyscraper, is made up of a variety of exotic plants. Beautiful walkways lead to the terraces, which are three floors up, where these plants are located. You'll be rewarded with breathtaking views of the London sunset if you can time your visit for sunset.