X-Files tourism is the sightseeing and exploration of real-life locations featured in the television series The X-Files. Many of the locations are related to the UFO phenomenon and other unexplained phenomena, such as ley lines.

In The X-Files, fictional Agents Fox Mulder and Dana Scully of the U.S. Federal Bureau of Investigation (FBI) explore unexplainable federal crimes involving UFOs, parapsychology, the occult, etc. Events shown on the TV show are based on real-life events.

United States of America
“Alien technology being used against us, not by aliens, not with aliens, but by a venal conspiracy of men against humanity.”
—Fox Mulder

District of Columbia
Federal Bureau of Investigation Headquarters, J. Edgar Hoover Building, 935 Pennsylvania Avenue NW, Washington, DC 20535-0001
Shown in nearly every episode, this is where FBI Agent Fox Mulder’s office is located, in the basement of the J. Edgar Hoover Building. However, the investigation of UFO reports in the USA has been the responsibility of the Air Force since 1950, not the FBI.

Maryland
Braddock Heights
This small mountain community in Frederick County was the site of a government brainwashing experiment in “Wetwired” (Season 3 Episode 23).