Crossrail Place Roof Garden sits on top of the Elizabeth line station at Canary Wharf, a long, narrow public garden enclosed by a sweeping lattice roof of timber and ETFE cushions. Because it lies almost exactly on the Greenwich meridian, it is planted as two halves — species from the eastern hemisphere on one side, the western on the other — running from bamboo and tree ferns to Mediterranean shrubs.
It is free, open daily, and a genuinely calm green escape among the towers, with a performance space and cafés at one end. Come for a quiet sit between the high-rises, or combine it with the dock-side walk and the Docklands museum nearby for an easy half-day in this corner of London.