The white center is the Mississippi River, the colored curves on either side show former its former locations. Rivers move around a lot over time and adjacent land is much better for farming or parks than for housing, which is likely to flood.
Antelope Canyon is at once one of the most breathtaking and tranquil places on earth. Gently carved from the Navajo sandstone over the course of countless millenniums, the slot canyons are majestic and narrow passages, just enough space for a small group to walk the sandy floor - and for the occasional shafts of sunlight to shine down from above. Located on Navajo land near Page, Arizona.
Map of the Challenger Deep that explores the deepest area known to man on earth, the Mariana Trench. If Mount Everest were dropped into the trench, it would still be covered by over a mile of water. Amazing!