You are downloading the NatGeo Pictures XAP file v18.104.22.168 for Windows Phone. NatGeo Pictures is a free and useful Photo & Video app: This app shows pictures from the National Geographic website's picture of the day in the photography section. You can view the last 25 pictures, ... You can now download the offline XAP file to install & try it.
Download Locations for NatGeo Pictures 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline NatGeo Pictures XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.