It was once the strongest fortress on the Rhine, serving as the seat of the Counts of Katzenelnbogen.
The castle escaped destruction during the Thirty Years' War due to its formidable defensive design.
Much of the current ruin state is the result of systematic gunpowder demolition by French troops in the late 18th century.
The complex includes a labyrinth of 'minengänge' (mine galleries) built to counter enemy mining tactics during sieges.
In the 19th century, Prince William of Prussia acquired the ruins to prevent them from being completely leveled.
The original 13th-century residential tower remains a focal point of the site's footprint.
The site was historically significant for controlling river trade and levying tolls on Rhine traffic.
Rheinfels Castle is the largest fortress ruin overlooking the Rhine River, originally constructed in 1245 by Count Diether von Katzenelnbogen. The site features an extensive network of underground tunnels, moats, and bastions that visitors can explore. It served as a strategic toll station and defensive stronghold, surviving several sieges before its partial demolition by French revolutionary troops in 1797. The ruins are managed by the town of St. Goar and function as an open-air museum. Visitors navigate through remnants of the great hall, cellars, and defensive walls. The site incorporates a nature trail that winds through the surrounding hillside. A dedicated museum on the premises provides historical context regarding the castle's architectural evolution. The ruins are characterized by their vast scale compared to other Rhine Valley fortifications.
The highest remaining wall section, which offers a panoramic vantage point over the Rhine bend.
Bring a sturdy flashlight for the dark, unlit underground tunnel sections.
Wear closed-toe, non-slip footwear as the terrain includes uneven cobblestones and loose gravel.
Plan for extensive walking as the castle grounds cover a very large area.
Do not attempt to explore the dark underground tunnels without proper lighting or appropriate footwear.
The site is typically closed during the winter months, usually reopening in late March.
No climbing on the historic masonry; stay within marked paths for safety.
