The four-story “quadplex” of Steinway Tower overlooks Central Park and offers 360-degree views of New York City.

A luxury penthouse atop the fourth-tallest residential building in the US, located in Manhattan, is now on the market for ...

A quadplex penthouse in Manhattan's Steinway Tower, the world's skinniest skyscraper is on sale for $110 million.

The starting point of the pilot plant is a solar tower with around 500 movable mirrors. The mirrors concentrate the sun's rays on a special radiation receiver at the top of the tower. This ...

where pencil towers have continued to climb higher, including the nearby Central Park Tower, which is the second-tallest building in the city behind One World Trade Center. Though quadplex ...