Verla is a well-preserved 19th century mill village and a UNESCO World Heritage Site since 1996. The first groundwood mill at Verla was founded in 1872 by Hugo Nauman but was destroyed by fire in 1876. A larger groundwood and board mill, founded in 1882 by Gottlieb Kreidl and Louis Haenel, continued to operate until 1964.
The Verla groundwood and board mill and its associated habitation are an outstanding and remarkably well-preserved example of the small-scale rural industrial settlement associated with pulp, paper and board production that flourished in northern Europe and North America in the 19th and early 20th centuries, of which only a handful survive.
Verla museum is open for visitors from May to September, but the larger World Heritage Site area can be explored around the year.
The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.