Landmark 2 is an updated version of Landmark Watch Face, for Wear v2.
Landmark 2 now uses the Flickr API (as 500px are disabling their API in mid 2018) and works entirely on your wearable without the need for an app on the handheld*
Configuration options include setting the refresh interval, the search radius, and enabling a smooth motion second-hand.
The watch face shows images from around your location and updates hourly (or more often if you triple-tap the face)
* and app is coming later so you can view images you've seen on the watch face, as previously.