The Rijeka&Opatija Tourist Card (www.touristcard.hr) offers a 24/48/72-hour discount card for 45/75/105KN. It includes free admission to museums in both towns, as well as some free parking and public transport. Buy it at the tourist offices in Rijeka or Opatija.
There’s free wi-fi in central Opatija and Volosko.
Maršala Tita has numerous ATMs and travel agencies eager to change money.