national monument. noun. Definition of national monument for English Language Learners. : a place (such as an old building or an area of land) that is owned and protected by a national government because of its natural beauty or its importance to history or science. Britannica.com: Encyclopedia article about national monument.
Brown or discolored water is caused by minerals, sediment, or rust that may accumulate in the water mains over time. When the water from your tap is brown this indicates a disturbance in the water main that stirs up these deposits.
That's probably heat/drought stress. If your grass is turning brown, that may mean your tree isn't getting enough water. A newly planted tree doesn't compete well with grass, weeds, or nearby big trees. They suck the water right out from under your tree.