Change what you want to search for below if 'cityscapes' aren't your thing :) Post will also include proper attribution and a link back the 500px photo.
If

New photo from search
This Trigger fires every time a new photo is uploaded to 500px that matches a search query you specify. NOTE: limited to 30 items per check.
Then

Create a photo post
This Action will create a photo post on your Tumblr blog.
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About Tumblr (legacy)
Tumblr is your canvas. Post text, photos, GIFs, videos, live videos, audio, anything. Applets can bring content to your Tumblr from all your different social medias, and help you manage your Tumblr likes.
Tumblr is your canvas. Post text, photos, GIFs, videos, live videos, audio, anything. Applets can bring content to your Tumblr from all your different social medias, and help you manage your Tumblr likes.
About 500px
500px is a photo community powered by creative people worldwide that lets you discover, share, buy and sell inspiring photographs.
500px is a photo community powered by creative people worldwide that lets you discover, share, buy and sell inspiring photographs.