Manhattan has one of the most famous skylines in the world, and the best part is it’s constantly changing. A perfect example is this photo from a private terrace at Penthouse B at 44 Laight Street in TriBeCa, which is available to rent through CORE’s Liz Dworkin for $20,000 per month. Look closely and you’ll see a crane and steel rising in the distance. That black speck is 1 World Trade Center in Lower Manhattan, soon to be the tallest building in the country at 1776′ tall. Today, according to the latest update, the building’s structural steel has risen to the 91st floor, and it will keep rising rapidly until April. It’s fun to see how a view changes over time, and it’s even more fun to do so from a Jacuzzi.