Minimo - An elegant, simplified new tab page
Louvre Museum Online - Explore the entirety of the Louvre's collection for free
Mustsee - Discover the world’s most beautiful places
Virtual Museums - Explore the world's museums, virtually.
New Tab by Flickr - Get a beautiful photo each time you open a new tab
Sketchfab for Museums - Browse thousands of cultural artifacts in 3D and VR