A Stream through a Dense Forest, François-Louis Français
Watercolor and gouache with pen and ink; roughly 18×14″ (46x34cm).
Link is to zoomable version on Google Art Project; original is in the National Gallery of Art, DC, which also has a zoomable version as well as downloadable images (free registration required for largest file size).
This beautifully naturalistic forest scene is one of the recently acquired landscape watercolors highlighted in a show at the NGA in 2014.
Though your eye is intended to travel back into the depth of the painting’s bright center, I love the subtle value relationships in the darker passages.