Castle Mont Rouge, Unfinished castle on Red Mountain, Rougemont, United States.

Castle Mont Rouge is an unfinished castle of pale tan concrete on Red Mountain in Rougemont, North Carolina, north of Durham. Its tall central block has a rounded lower face with narrow arched and rectangular windows, and a very tall thin spire with a dark pointed top rises on the left among smaller pointed turrets. A lower wing on the right carries a bulbous, chalet-like tower with a tall finial.

Sculptor Robert Mihaly started building the structure in 2000 without formal blueprints, working entirely from his own vision. Construction stopped in 2006 and the site has remained unfinished since then.

Robert Mihaly built Castle Mont Rouge as a private residence and country studio, living in one of the finished rooms; his long-time partner Caroline Smith joined him in 2003. The design draws on Central and Eastern European architecture, with 18 pinnacles and a turret. Local lore grew around the castle and its creator, including a rumour that Mihaly was a widower, which he denied on television.

The building sits along Mountain Brook Road and is still under renovation, so access may be limited on any given day. It is worth checking conditions before making the trip out to the site.

Robert Mihaly began building in 2000 without a blueprint, and the castle was abandoned by 2006; graffiti writers marked much of the structure before he resumed restoration in 2017. Since mid-March 2021 the access road has been blocked by a gate on private property, and entry requires permission.