Shinjuku Gyoen National Garden is a large park in the middle of busy Tokyo, located a 15-20 minutes walk from Shinjuku Station. You wouldn’t believe that you are in the heart of Tokyo once you step inside of this green oasis. You will love walking around the beautiful Japanese and western-style gardens, which are popular as sightseeing spots. It is so large that it is possible to get lost inside this park, so make sure to ask for a map when you enter Shinjuku Gyoen. Yoyogi Park near Harajuku Station is also a popular place to visit, and you can spend tranquil and comforting time in both parks.