Commissioned public artwork has been part of our culture for many millennia. Over time, as world travel has become easier and safer, commissioned civil works of art have turned into tourist attractions all their own. From the bustling streets of New York City and Chicago to quieter corners of the globe in Howick, South Africa, and Las Colinas, Texas, Architectural Digest surveys 13 of the world’s most fascinating public sculptures. Each one answers a cultural curiosity—a question that was asked by a group or city officials, and answered by the artists.