Why not? Carrol Anne Thompson submits a site with 15 of them. A sampling:
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Football goal posts were placed in bus shelters around Sao Paulo, Brazil to promote the World Cup:
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Watermelon bus stop in Ishaya, Japan.
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This minimalist structure that looks like a single sheet of white concrete was designed by architect Justo García Rubío and located in Casar de Caceres, Spain:
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London bus stop by Bruno Taylor:
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And one from Vancouver:
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This “chairlift” shelter at Robson & Thurlow (disused during Viva Vancouver bus diversions) was a clever local one: http://www.flickr.com/photos/ian_yvr/7243635940/