FRANKFURT, Germany - A world financial center packed with investment bankers sounds like a tough place to do on a budget, but even the Manhattan of continental Europe has secrets aplenty for the thrifty.

GETTING AROUND: Frankfurt is so compact that walking is the best way to see it, but for $2.40 you can use the U-Bahn in the city center ($5.90 for a day pass). For $7.65, tour the city on the “Ebbelwei Express,” an old streetcar named after the drink served free on board, apple wine. If that’s not to your liking, there is juice and, of course, pretzels, ebbelwei-express.com.