London’s Marble Arch Mound was a fiasco in a city losing so many green spaces – but pop-up parks can work
London’s Marble Arch Mound was a fiasco in a city losing so many green spaces – but pop-up parks can work: The Marble Arch Mound has been dubbed the "worst attraction" in London. PA Images/Alamy The original plans for the temporary Marble Arch Mound in London depicted an inviting green space with thick vegetation and …