Every hotel we have stayed in the US requires you to be 21 to check in and certainly with a 16 year old (unless as the poster said,you are both female) would absolutely not be allowed..If someone over 21 checked you in,it might be allowed but call the hotel and make sure.
Known by many as the St. Louis Arch or simply âThe Arch, this structure's actual name is the Gateway Arch. As part of the Jefferson National Expansion Memorial, the Gateway Arch stands as a monument to the westward expansion of the United States that occurred after Thomas Jefferson completed the Louisiana Purchase.
The Arch has foundations sunk 60 feet into the ground, and is built to withstand earthquakes and high winds; it sways up to 1 inch in a 20 mph wind, and is built to sway up to 18 inches. A Grand Staircase leads from the St. Louis levee up to the base of the Gateway Arch. Fees are charged to ride the unique tram system to the top.