My last day in London I had to get a COVID test to return to the USA. While waiting for results, I went for a walk through the lovely Green Park, from the tube stop to Canada Gate and around to Lancaster House.
Even though it was late February, chilly, and no leaves on the trees, it's still a sanctuary. Also surprisingly quiet even though it is, in essence, Buckingham Palace's north lawn with all the bustle of Mayfair and Soho beyond. Had a great walk around the grounds for an hour, took some pictures in front of the gate and palace. Wonderful.