NASA has a great web site for viewing pictures of changes that have occurred over time around the globe, both from natural causes like landslides and manmade causes like increases in agriculture.  You may enjoy paging through these to see how the earth’s surface has varied on a variety of time scales.  The photos below, from the site, show increases in agriculture in Saudi Arabia due to pumping from underground aquifers using center pivot systems.

The site is at

Source{ NASA
Source: NASA