Radlje ob Dravi has a long history, with findings dating back to Roman times. Then, Villa Radela was first mentioned in documents in 1161 and as a marketplace in 1268. Nowadays, Radlje still retains its marketplace origins. A number of smaller neighboring villages are also worthy of a visit, namely: Breznivrh, Dobrava, Kozjivrh, Radelca and Remšnik. The Middle Ages appearance and feeling of the town were influenced by the Dominican monastery (1250) which nestled in the Kozjan hills. Of particular interest in the area are also the caves in the side of the Perkolica hill.
Lovers of green tourism created the first biological pool in Slovenia in the green town of Radlje Ob Dravi, far from the hustle and bustle of the city. The water circulates with the help of a small pump, as the pool is cleaned completely naturally using sand filters and plants. This natural swimming area is surrounded by the meadows, fields, and forests of the Koroška Region.