Juan Manuel Borrero / Vertical garden on the walls of a tower block, Barcelona. Catalonia. Spain, June 2013.

Juan Carlos Munoz / House built during period of Catalan Modernism, Olot, La Garrotxa Natural Park, Girona, Catalonia, Spain. 2019.

Juan Carlos Munoz / House built in Catalan Modernist style, Olot, La Garrotxa Natural Park, Girona, Catalonia, Spain. 2019.

Loic Poidevin / Flowers on balcony, Grimentz, Valais, Val d'Anniviers, Switzerland, September.

Luke Massey / Peregrine falcon (Falco peregrinus) female at nest in ubran balcony with sunset and city lights behind, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) female at nest on balcony, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) male on balcony, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) female at nest, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) recently fledged juvenile, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) juvenile on balcony with female and human resident, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) on nest in balcony, Chicago, USA

Luke Massey / Peregrine falcon (Falco peregrinus) feeding chicks at nest in planter on urban balcony, Chicago, USA