Alter Ego: A Worldwide Documentary About Graffiti Writing Filming Locations

Basel is a city on the Rhine River in northwest Switzerland, close to the country’s borders with France and Germany. Its medieval old town centers around Marktplatz, dominated by the 16th-century, red-sandstone Town Hall. Its 12th-century Gothic cathedral has city views, and contains the tomb of the 16th-century Dutch scholar, Erasmus. The city’s university houses some of Erasmus’ works.

Berlin, Germany’s capital, dates to the 13th century. Reminders of the city's turbulent 20th-century history include its Holocaust memorial and the Berlin Wall's graffitied remains. Divided during the Cold War, its 18th-century Brandenburg Gate has become a symbol of reunification. The city's also known for its art scene and modern landmarks like the gold-colored, swoop-roofed Berliner Philharmonie, built in 1963.

Hamburg, a major port city in northern Germany, is connected to the North Sea by the Elbe River. It's crossed by hundreds of canals, and also contains large areas of parkland. Near its core, Inner Alster lake is dotted with boats and surrounded by cafes. The city's central Jungfernstieg boulevard connects the Neustadt (new town) with the Altstadt (old town), home to landmarks like 18th-century St. Michael’s Church.

Hong Kong is a special administrative region of the People's Republic of China. With 7.4 million residents of various nationalities in a 1,104-square-kilometre territory, Hong Kong is one of the most densely populated territories in the world.

Los Angeles is a sprawling Southern California city and the center of the nation’s film and television industry. Near its iconic Hollywood sign, studios such as Paramount Pictures, Universal and Warner Brothers offer behind-the-scenes tours. On Hollywood Boulevard, TCL Chinese Theatre displays celebrities’ hand- and footprints, the Walk of Fame honors thousands of luminaries and vendors sell maps to stars’ homes.

Mainz is a German city on the Rhine River. It’s known for its old town, with half-timbered houses and medieval market squares. In the center, the Marktbrunnen is a Renaissance fountain with red columns. Nearby, a distinctive octagonal tower tops the Romanesque Mainz Cathedral, built of deep red sandstone. The Gutenberg Museum honors the inventor of the printing press with exhibits, including 2 of his original bibles.

New York City comprises 5 boroughs sitting where the Hudson River meets the Atlantic Ocean. At its core is Manhattan, a densely populated borough that’s among the world’s major commercial, financial and cultural centers. Its iconic sites include skyscrapers such as the Empire State Building and sprawling Central Park. Broadway theater is staged in neon-lit Times Square.

São Paulo, Brazil’s vibrant financial center, is among the world's most populous cities, with numerous cultural institutions and a rich architectural tradition. Its iconic buildings range from its neo-Gothic cathedral and the 1929 Martinelli skyscraper to modernist architect Oscar Niemeyer’s curvy Edifício Copan. The colonial-style Pátio do Colégio church marks where Jesuit priests founded the city in 1554.

Sydney, capital of New South Wales and one of Australia's largest cities, is best known for its harbourfront Sydney Opera House, with a distinctive sail-like design. Massive Darling Harbour and the smaller Circular Quay port are hubs of waterside life, with the arched Harbour Bridge and esteemed Royal Botanic Garden nearby. Sydney Tower’s outdoor platform, the Skywalk, offers 360-degree views of the city and suburbs.