The huge Christmas tree inside Washington Union Station, the decorations are environmentally friendly and cute. Traveling needs to be noted, out of the station, the ground is Columbia circle, in all directions, the nearby Hyatt Hotel is great. United Station, the Washington, D.C., railway hub, opened in 1907 and is an important hub for Amtrak, the second busiest Amtrak station in the United States, after New York's Pennsylvania station. The station is located at the southern end of the Northeast Corridor line of the electrified railway, and is north of Baltimore, Philadelphia, New York and Boston, resulting in a huge passenger flow. It is also one of the busiest and most well-known places in Washington, D.C.