What is it about Rio de Janeiro? The always-busy beaches of Copacabana and Ipanema. The spectacular mountain-top views from Christ the Redeemer, Sugarloaf, and Mount Corcovado. The funky neighborhoods of Lapa and Santa Teresa. The dangerous allure of favelas.  The smells and tastes of Brazil's national dish, feijoada; never-ending churrascaria barbecue; fresh-baked cheese bread; and "okay, I'll have just one more" caipirinha cocktails. What's not to love about Rio de Janeiro? Absolutely nothing!