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 Eads Bridge, which became an iconic image of the city of St. Louis, from the time of its erection until 1965 when the Gateway Arch was constructed, is still in use. The bridge crosses the St. Louis riverfront between Laclede's Landing, to the north, and the grounds of the Gateway Arch, to the south.