Famous cities of the world. Paris, France Paris

Rajasthan's capital, a.k.a. the Pink City, isn't the kind of place to hide its true colors. The city’s maharaja, Sawai Ram Singh II, ordered the buildings be painted an orangey-pink color in 1876 for a royal visit from Prince Albert and Queen Victoria; many buildings in the city’s old town remain painted this color today.

London, U.K.

London is one of the most vibrant cities in the world, with history (Westminster Abbey) and models of modernity (London Eye, The Gherkin) mingling on the Thames. Art and literature seem to seep out of the city's walls—and in recent years, London has glammed up even more, with contemporary art galleries and boutique retailers adding some glimmer to formerly seedy areas.

New York, New York

New York's beauty is multi-sensory: It's the historic architecture, from the Flatiron Building to One World Trade Center. It's the feel of grass beneath your feet (and the smell of roasted nuts) in Central Park. It's the art of the Met, MoMa, and Frick. But most of all, it's the sight of beautiful, diverse people walking the city streets with heads held high.

Rio de Janeiro, Brazil

Rio has some of the loveliest stretches of sand in the world, from Copacabana to Ipanema. Christ the Redeemer watches over the entire coastline, where a vibrant city seems to dance down to the sea and mellow as it floats off on a stand-up paddleboard.

Rome, Italy

Rome captivates travelers in ways few cities can—chalk it up to world-class architecture, impossibly narrow cobblestone vicoli, and museums filled with artistic masterpieces. Call us sentimental, but we still stop dead in our tracks at the first glimpse of the Pantheon as we turn into the Piazza della Rotonda.

Singapore

Singapore is a superlative city, with elaborate temples, extraordinary gardens, and world-class architecture (check out the candy-colored houses on Koon Seng Road). The beauty here is both natural and man-made, with travelers seeking out the city's tropical jungle in the Botanic Garden and the wild, technicolor Gardens by the Bay. As an added bonus, you can reach everything via some of the cleanest streets and subways we've ever seen.