This May 10, 2005 file photo shows the skyline of Frankfurt am Main, central Germany, in this picture taken from the Maintower sky scraper. 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 secret aplenty for the thrifty. From beautiful outside gardens to sizzling sausages, many of the city's pleasures are actually the cheapest.
