Ramstein Castle, Medieval castle ruins near Kordel, Germany.

Ramstein Castle is a ruined hill castle on a 182-metre Bunter sandstone rock at the edge of the Meulenwald forest in the lower Kyll valley near Kordel. Tall sections of curtain wall, elements of corner towers and almost all the exterior and stone staircases of its medieval tower house survive. Three larger modern buildings, including a hotel-restaurant, stand on the southern part of the east-facing promontory.

The castle was built in the early 14th century by Archbishop Diether of Nassau, replacing an older fortified estate on the same site. It was destroyed by French troops in 1689 during the War of the Palatine Succession and never rebuilt.

The ruins sit within the Meulenwald forest and draw walkers and day-trippers from nearby villages on weekends. The surviving wall sections still outline the shape of the old courtyard, making the layout easy to read even without a guide.

The site is reached by a forest path through Meulenwald, and the final approach climbs a steep rocky slope. Sturdy footwear is a good idea, as the ground inside the ruins is uneven and some steps are worn down.

The castle's name only became current around 1600; earlier records call it Runnesstein or Castrum Ruynstein. A memorial stone, the Brunnenstein, is kept in the inn's foyer on the castle grounds and records in 1527 how Archbishop Richard von Greiffenklau laid a clay pipe from a forest spring to supply the castle with water.