You can see the sunset from the deck or through the glass-fronted living room.

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They liked the experience so much, they worked with Ms. Thompson to design and build a modern, four-bedroom vacation house in Cape Cod, with lots of glass and deck space.

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Mr. Coffey has worked alongside cleaning machines at times but said his most important jobs, including cleaning the glass observation deck at the Twin Towers, have always been done by human hands.

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Sliding glass doors lead out to a side deck and then up a set of stairs to a roof lounge with powder-coated aluminum railings and cedar decking.

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Ride a glass elevator to the 160-meter-high observation deck for an incredible view of the city and its surroundings.

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Upon arrival, indulge in a glass of wine and cheese in the dining room, on the deck, or in the fully equipped kitchen before playing board games by the wood-burning fireplace.

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Floor-to-ceiling folding-glass doors in the upper-level living room open onto a wood deck that is equipped with an outdoor kitchen, furniture, another television, patio heaters and, of course, more Haring-inspired murals.

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The digs: The U-shaped white stucco-and-glass contemporary has 5 bedrooms, a screening room, a pool and a deck on 80 feet of beach.

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Glass walls flank an informal dining nook off the kitchen that looks out onto an ipe wood deck and a garden dotted with Japanese maples and columnar beeches.

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