What are 3 of your favorite famous paintings ever?

Question

I love Georges Seurat's "La Grande Jette", Monet's "Water Lilies" series (not just one in particular), and Van Gogh's "Starry Night". 
What do you like about them? I love Monet's and Van Gogh's vivid colors in these works and I love Seurat's very unique style and the way the painting tells a story (actually I saw a play based on it).

Answer 1

 

Nighthawks by Edward Hopper

Christina's World by Andrew Wyeth

Starry Night by Van Gogh.

 

I could name lots more I love but you said only three.