A default app is the program that Windows uses automatically when you open a particular type of file, such as a song, movie, photo, or webpage. For example, you might have more than one photo-editing app installed on your PC. You can choose one of them to be the default app that starts whenever you open a photo.
The Kerio Crater Lake in Iceland. The Kerio Crater Lake (sometimes spelled Kerid) is located in the GrÃ­msnes area in south Iceland, and is one of the most photogenic volcanic crater in existence. Itâs a regular stop for tourists along the Golden Circle sightseeing route and one of the most-photographed features in this amazing landscape.
1. Vredefort. The Vredefort crater was formed over 2 billion years ago, 60 miles from Johannesburg, South Africa. The diameter of the crater is believed to have been approximately 185 miles across but has since greatly eroded. It is the oldest and largest impact crater ever formed on Earth. In 2005, the crater became an UNESCO World Heritage Site because of its geological significance.