Seattle is a seaport city on the West Coast of the United States. It is the seat of King County, Washington state. With an estimated 730,000 residents as of 2018, Seattle is the largest city in both the state of Washington and the Pacific Northwest region of North America. According to U.S. Census data released in 2018, the Seattle metropolitan area’s population stands at 3.87 million, and ranks as the 15th largest in the United States. In 2013 and 2016, it was the fastest-growing major city in the United States. Seattle is the northernmost large city in the United States. The city is situated on an isthmus between Puget Sound (an inlet of the Pacific Ocean) and Lake Washington, about 100 miles south of the Canada–United States border. A major gateway for trade with Asia, Seattle is the fourth-largest port in North America in terms of container handling as of 2015.—Wikipedia
Midway Geyser Basin is much smaller than the other basins found alongside the Firehole River in Yellowstone National Park. Despite its small size, it contains two large features, the 200-by-300-foot-wide Excelsior Geyser which pours over 4,000 U.S. gallons per minute into the Firehole River. The largest hot spring in Yellowstone, the 370-foot-wide and 121-foot-deep Grand Prismatic Spring is also found there. Wikipedia
Mammoth Hot Springs is a large complex of hot springs on a hill of travertine in Yellowstone National Park adjacent to Fort Yellowstone and the Mammoth Hot Springs Historic District. It was created over thousands of years as hot water from the spring cooled and deposited calcium carbonate (over two tons flow into Mammoth each day in a solution). Because of the huge amount of geothermal vents, travertine flourishes. Terraces are made of crystallized calcium carbonate. The hot water that feeds Mammoth comes from Norris Geyser Basin. Algae living in the warm pools have tinted the travertine shades of brown, orange, red, and green. Wikipedia
