Brett Weston
[Photographer, b. 1911, Los Angeles, d. 1993, Kona, Hawaii.]
I use various types of cameras and photograph anything, anytime. It could be something modern or an ancient rock, it doesn’t matter. But, unless a landscape is invested with a sense of mystery, it is no better than a postcard. 
Emmet Gowin
[Photographer, b. 1941, Danville, Virginia, lives in Princeton, New Jersey.]
This is the gift of the landscape photograph, that the heart finds a place to stand. Jeff Wall
[Photographer, b. 1946, Vancouver, Canada, lives in Vancouver.]
In making a landscape we must withdraw a certain distance—far enough to detach ourselves from the immediate presence of other people (figures), but not so far as to lose the ability to distinguish them as agents in a social space. Or, more accurately, it is just at the point where we begin to lose sight of the figures as agents, that the landscape crystallizes as a genre. Henri Cartier-Bresson
[Photographer and painter, b. 1908, Chanteloup, France, d. 2004, Paris.]
The world is going to pieces and people like Adams and Weston are photographing rocks! (1930s) Sally Mann
[Photographer, b. 1951, Lexington, Virginia, lives in Lexington.]
Working in the inexhaustible natural pageant before me, I came to wonder if the artist who commands the landscape might in fact hold the keys to the secrets of the human heart: place, personal history, and metaphor. R. Crumb
[Cartoonist, b. 1943, Philadelphia, Pennsylvania, lives in Sauve, France.]
They were just snapshots, nothing special, nothing particularly artistic. They were used for utility purposes.(On photographs of mundane streetscapes he had “Stanley Something-or-other” take in Sacramento in 1988 to serve as backgrounds to his cartoons. “People don’t draw it, all this crap, people don’t focus attention on it because it’s ugly, it’s bleak, it’s depressing... But, this is the world we live in; I wanted my work to reflect that, the background reality of urban life.”)
John Szarkowski
[Curator, critic, historian, and photographer, b. 1925, Ashland, Wisconsin, d. 2007, Pittsfield, Massachusetts.]
To photograph beautifully a choice vestigial remnant of natural landscape is not necessarily to do a great favor to its future.... It is difficult today for an ambitious young photographer to photograph a pristine snowcapped mountain without including the parking lot in the foreground as a self-protecting note of irony. Lewis Baltz
[Photographer, b. 1945, Newport Beach, California, d. 2014, Paris.]
In my research, my interest has always been with the phenomenal margin, those areas that are not quite landscape, not quite visible, the marginally taboo, the nearly obscene.