All the photos are linked with 'Flickr' where you can download. Follow these steps:
1. Click 'Link' on the bottom right corner of image gallery of a photo you wish to download. It will take you to 'Flickr.com'

2. Click 'All Sizes' button which has a magnifying glass icon.

3. Choose and click the size you wish to download, and click 'Download the XXX size'
