Gustavsburg Palace in Jägersburg
Originally a moated castle called Hattweiler built by the Counts of Zweibrücken-Bitsch in 1395, converted into a palace by Count Palatine Johann I in 1590.

Originally a moated castle called Hattweiler built by the Counts of Zweibrücken-Bitsch in 1395, converted into a palace by Count Palatine Johann I in 1590.
Attractions nearby

Saarbrücken
St. Arnual Dragon's Teeth (Westwall)
A 700-meter line of Westwall anti-tank obstacles on the Petersberg in Saarbrücken-St. Arnual - the final construction phase of 1940, now a listed monument.

Saarbrücken
The Burning Mountain near Dudweiler
Not really a mountain but a rocky ravine - a coal seam has been smoldering inside it for more than 300 years. Goethe visited the Burning Mountain in 1770.

Merzig
Dagstuhl Palace
The palace was built in the 18th century, with a beautiful chapel, a Stations of the Cross and a crypt to visit.