From an email:
This summer, the National Building Museum brings back its popular indoor Mini Golf exhibition. The expanded attraction features two nine-hole courses, with all new holes designed and built by leading Washington-area architects, landscape architects, and contractors. The courses explore the architects’ and designers’ ideas for “Building the Future,” with twists and turns sure to challenge golfers young and old.
National Building Museum
401 F Street NW
Washington, DC 20001
(Judiciary Square Metro, Red Line)
Memorial Day (May 27, 2013) to Labor Day (September 2, 2013) during Museum hours. The Museum will also feature six “Mini Golf Late Night” evenings throughout the summer during which Mini Golf will remain open until 9 pm: June 6, June 27, July 11, July 24, August 8, and August 22.