Inside Out is a participatory art exhibition dreamed up by the artist JR. Send in a portrait of a local person, and JR’s team will turn it into a poster and mail it back to you, to be displayed wherever you like. The effect is a worldwide street-level exhibition about the people we share the world with. There’s also an online gallery. Top: Nublus, West Bank; Middle Left: Bronx, New York; Middle Right: Cape Town, South Africa; Bottom: Chiang Mai, Thailand.