Sky Garden, London
Took a super-fast lift up to 'London's highest public garden'. Needless to say the views were incredible, but the planting within was also amazing. It was designed by Gillespies and aims to create a 'lush prehistoric forest'.....wonderful inspiration in terms of thinking big and unique, but I am not sure anyone in Chester will be trying this soon!
It is free to visit although you need to book in advance and be prepared to take a little while to get through airport-type security.