The thermal spring just east of Čatež ob Savi (3km southeast of Brežice) has attracted rheumatics since the late 18th century. Today, the huge Terme Čatež spa and holiday complex is every bit as much a recreational area, popular all year. There's an outdoor pool playground, year-round indoor complex, saunas, three hotels, enormous campground, wellness centre and various family-friendly activities.

Its huge Summer Thermal Riviera area is packed with family-friendly fun and is tremendously popular on summer weekends.

Open year-round, the indoor, dome-topped Winter Thermal Riviera is a massive complex spanning 2300 sq metres; it has a pirate ship ensconced in one pool, plus a wave pool. Water temperatures tip 33°C.

There are at least half-hourly bus services (€1.30, five minutes, 3km) between Brežice and Terme Čatež.