At first glance, the 266-foot-long footbridge across the Rio Mondego in central Portugal looks like one of those classic concrete bridges designed in the early 1900s by the great Swiss bridge engineer Robert Maillart. But it isn't, quite. The two halves of the bridge are asymmetrical and push against each other where they meet in the center. The design, by Cecil Balmond of Arup, António Adão da Fonseca, and AFAssociados, is both ingenious and, with its central kink, somewhat contrived. As for the balustrades of colored glass, well, sometimes too much is just too much.