Highly recomment like others, Koudelka - both Chaos and the newer Koudelka book for urban landscape (this guy is fantastic - what a unique vision).

Paula Chamlee - Natural Connections, Tuscany. Michael Smith - Tuscany. Brett Weston - White Sands, SanFran and possible the new New York portfolio for urban landscape.

Others have mentioned, Barnbaum, Sexton, Capanigro,...

May want to look at Josef Sudek Panorama - Prague (hard to find, expensive)