As a programmer how would you download such an image file?

I want to download the following image to local disk for using as wall paper, it's really beautiful:

https://static-christiesrealestate-cms-production.gtsstatic.net/resources/v_4_19_0_67/_responsive/images/common/nophoto/listing.jpg

Using an online URL decoder (www.urldecoder.org) I got:

https://static-christiesrealestate-cms-production.gtsstatic.net/resources/v_4_19_0_67/_responsive/images/common/nophoto/listing.jpg

But obvious it's the not the same picture I want.

How would you download an image like that?