The indoor portion of the observation deck includes a pair of over-size, concave mirrors that produce fun-house reflections of visitors.

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But among the tasks the machine can perform in a single step are edge detection, inversion, the identification of lines and shapes of different orientations, and the filling-in of concave shapes all things that are useful in image-processing, and not all of which can be managed by digital technology.

ECONOMIST: Analogue computing

Measuring in at less than 1, 000-square-feet, the ultra-modern cylindrical boathouse with its rounded entrances and smooth concave walls resembles the cave-like formations for which it was named.

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Lexus-characteristic L-shaped combination lamps feature a layered, strongly three-dimensional design, and the lower, concave bumper section incorporates a full width spoiler to further enhance rear-wheel drive traction.

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