The Walkie Talkie, a building built by Rafael Violy, is home to London's largest public park. It is on the top three floors of the building. From the middle of the city, the Sky Garden looks drift hunters out over the Thames. The views inside and out are stunning.

Wangen-Jones said that Sky Garden is the perfect place to relax in nature and enjoy beautiful views of the city skyline. He also said that it's a great thing to do in the winter. "It's free to enjoy, but you should definitely make a reservation ahead of time because both locals and tourists love it."

Want to visit free museums? Well, there are a lot of them in London. No matter what you're interested in, it seems like there's a whole building for it. Wangen-Jones said, "You can go into most of London's museums for free." "It's a must to visit at least one or two of them during a trip to London. Some are well-known, like the Victoria & Albert and the British Museum. Others, like the Grant Museum of Zoology and the Wellcome Collection, aren't as well-known but are still worth seeing."

The National Gallery, on the other hand, has a little bit of everything all in one place. With art from the Middle Ages to the 20th century, you can look at works by Da Vinci, Caravaggio, and Van Gogh all within a few minutes of each other. Also, it is amazing how the British say the name of the Dutch master, Van Goff.