Visitors climb 455 steps -- or ride one of two elevators -- to two observation decks offering expansive vistas across London.

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According to public records, Mr. Hirshberg's 11, 374-square-foot home has two elevators and a pool, and Mr. Wallette's Spanish-style home, which was built in 2009, has marble countertops and an outdoor kitchen and bar.

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It touts a private entrance off the corner of the building with not one, but two private elevators.

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These elevators consume energy in two scenarios: when a heavily loaded elevator car ascends or a lightly loaded elevator car descends.

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About 270 miners were stuck in two underground coal mines in eastern India as elevators stopped working.

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"We might as well bring back the ice and the elevator operators, " he added, referring to two symbols of the old days: daily deliveries of ice to every congressional office, and automated elevators so lawmakers wouldn't have to push buttons.

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