NEW YORK (CNN) - The One World Trade Center building stands at an impressive 1,776 feet.
It features several floors of office space and will also hold a theatre when it opens.
After a decade of planning and construction, One World Trade Center is getting ready to open for business by the end of this year.
Workers are still building out the lobby, but there are some distinctive nods to the original World Trade Center complex.
"This beautiful white marble is from the same quarry as the marble that was in the lobby of the original Twin Towers," said Jordan Barowitz of The Durst Organization.
And the entrance is starting to take shape.
"As you can see the floors are in, the walls are in, the ceiling is in. Behind me is a glass wall that protects the lobby, and these slabs bring natural light in," he said.
Up on the 63rd floor, there is some finished office space.
"This is our marketing center and it gives prospective tenants a sense of what the building will look like when it's built out and occupied," Barowitz said. "The floor is about 40,000 square feet. The building tapers as it gets up, and the floors get a little bit smaller. The asking rents below the 64th floor are about $75 a square foot, and up above it's upon request."
Barowitz says 55 percent of the office space has already been leased, anchored by media company Conde Nast. But the floors with the best views aren't for rent.
Developers of One World Trade Center are saving the top three floors for an observation deck complete with food, drinks and a small theater.
"(The) 102nd floor of One World Trade Center is the highest occupied floor in the building. It will be the observation deck open to the public," Barowitz said. "This floor is a 360-degree unobstructed view of the metropolitan region."
The building is by no means finished. In fact, there is still some heavy construction going on in some areas. But much of the center has started to take form, and it's not hard to imagine what the finished building will look like when it opens later this year.
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