Actually, that is supposed to be there, the site is not hacked. Search for Darth in the search box:
"Gargoyle Tours Watch a slide show of the residents of the Cathedral?s menagerie, hear stories of their creation and see these funny and sometimes frightening creatures on the Cathedral. Bring your binoculars to spy on Darth Vader and other tower inhabitants. Available April through October. Reservations are required. Tour cost $5. Please call (202) 537-2934 for family tours."