Millennium Gate

The Millennium Gate is a structure on Earth, located in the U.S. state of Indiana. The structure is a kilometer high, and 3.2 kilometers wide at the base.

Shannon O'Donnell - a distant ancestor of Starfleet Captain Kathryn Janeway - was insturmental in helping convince Henry Janeway to close his bookstore and allow construction to proceed. The Millennium Gate was built in the early 21st century, and was the first structure on Earth that could be seen unaided from space. (VOY episode 11:59)