The Spa Gardens (Kurpark) are one of Germany's most beautiful parks and is towered over by the mighty castle ruins of Badenweiler. Due to the Mediterranean climate, exotic plants like oleander, hibiscus, magnolias, giant cedars and sequoias, bananas, lemons, palms, eucalyptus, bamboo as well as a large number of native plants thrive here. Numerous hiking paths which lead to various panorama viewpoints run around the castle hill. As a result, visitors have a view into the Rhine Valley and across to Blue Mountain (Blauer Berg). In 2006 the pond in the spa gardens was redesigned.
The little pleasure palace Belvedere located below Badenweiler Castle was built in 1811 by the architect to the Grand Duke, Friedrich Weinbrenner. In particular Grand Duchess Stephanie Beauharnais of Baden, Napoleon's adopted daughter, liked to spend time at the little palace. Later the building was empty for a long time before it served as a church for the many English spa guests toward the end of the 19th century. Between 1930 and 1933 the painter Emil Bizer set up his studio there. Today various art exhibits take place in the Belvedere. In addition, it can also be rented for wedding ceremonies.
In 75 AD a Roman settlement was established below what is today the Cassiopeia baths, which bore the name Aquae Villae (water city). The antique Roman baths of Badenweiler were built during the reign of Emperor Vespian. Following the withdrawal of the Romans it gradually decayed. In 1784 it was accidentally rediscovered. At that time Margrave Karl Friedrich of Baden commissioned the remodeling of his administrative building (Amtshaus). The building materials were to be taken from the nearby "quarry". In the process, the remains of the baths were discovered. The individual architectural components of the Roman bath can still be seen clearly today. It is divided into a hot, warm and cold bath area. To protect the ruins of the bath from the further effects of weathering, a glass roof was constructed over it in 2001.
Additional information is available at Ruins of Roman Bath Badenweiler
The literary museum, also called the Chekhov Salon, is located in the health resort building (Kurhaus) of Badenweiler and is devoted to the Russian author, novelist and playwright Anton Pavlovich Chekhov. It shows a large number of letters and original documents on his stay in Badenweiler and on his reception. Four years after his death the world's first monument to him was erected in the Badenweiler Spa Gardens (Kurpark). In 1918 it was melted down to produce arms in World War I. It was then not until 1992 that a new bust was donated by the friends of Chekhov of Sakhalin Island and placed on the empty base.
The Grand Duke's Palace was built from 1586 to 1588 as the administrative building (Amtshaus) of the Margrave of Baden and served until approximately 1689 as the main administrative offices (Oberamtssitz). After the administrative seat had been moved to Müllheim in 1727, the Grand Dukes and their families soon took up residence in the administrative building remodeled to a summer residence with its surrounding park. In 1887/88 Grand Duke Friedrich I of Baden decided to have a new building erected in the grand style of the Renaissance. The building belonged to the House of Baden until the death of Grand Duchess Hilda in 1952, for whom Badenweiler had become a second home. When she died an era came to an end. The palace was turned over to the community of Badenweiler and today is home to a variety of art exhibits.