This week on the Travel with Rick Steves radio show: Get an inside look at the (mostly) friendly rivalries of Scandinavia as a pair of tour guides from Sweden and Norway sit down for a chat. Then hear from a London Blue Badge guide about what to know — and love — about London's famous underground metro system. And listen in as we explore the grand castles of the Czech Republic. Find your local station, subscribe to the podcast, or listen online at https://www.ricksteves.com/watch-read-listen/aud