this is the slimmest building in the world.

What does it take from an engineering perspective

to actually construct something like this?

It's a combination of very advanced wind tunnel testing

that wasn't available a few years ago.

Okay. Much stronger concrete

than was available a few years ago.

And a number of other engineering factors.

It really turned out to be this amazing juxtaposition

of old and new.

As we stand here and you look up

you have this amazing restored copper lantern

that we refabricated off original drawings

and then this amazing contemporary tower behind it.

So it's that old and new play

that we were very excited about as developers.

You don't get a chance to do this very often.

I'm on the 43rd floor in a $28.75 million apartment.

This is 50 feet of glass on Central Park.

The apartment is obviously quite nice

but the real star of the show is the view.

In the kitchen, when you're taking a break from cooking

or watching someone cook for you

you can look out to Columbus Circle, to New Jersey

all the way down Central Park to Harlem.

Each apartment takes up an entire floor

so when you step off the elevator, you're home.

The front of the apartment is entertaining spaces,

the back is bedrooms.

This apartment has three bedrooms,

so as you walk down a hallway

that's filled with more closet space

than most New Yorkers have as living space

you go into one of the three bedrooms

where there is a marble covered bathroom.

And then the bedroom itself.

You have views of the Empire State Building.

You can actually see the terra cotta

on the side of the facade.

And of course you have views

through all of southern Manhattan.

I'm here in the master bathroom.

Next to me is a bathtub that was custom designed

for this space.

The walls and floors and sinks,

even the insides of the sinks, are onyx.

The walls are more polished,

the floors are more matte, if that matters.

And then over here is the shower.

And there is a window looking straight out across Manhattan.

So even in the bathroom you've got a view in this apartment.

I'm on the 82nd floor, above all the residential spaces

standing in front of 800 tons of steel

that comprise the tuned mass damper

that basically counteracts the sway of the building.

Now, even if this wasn't here, the building would be fine.

It's exclusively for comfort.

And what it does is when the building sways in one direction

it moves in the opposite direction

to keep the building as straight and steady as possible.

Now, it's not just the steel, it's also filled with sand.

So this is a colossal contraption that takes up,

as you can see, the entire floor of the building.

So we're on the exterior hoist,

I wouldn't want to say plummeting

but it certainly feels like we're plummeting.

We're descending on the exterior of the building.

It's definitely not for the faint of heart

or for anyone who has ever confronted their own mortality

because there's a lot of jitters

and it's something that the people who are building this

are quite inured to.

But for a casual visitor it is, I would say,

absolutely terrifying.

We're standing in the 94 year old

historic Steinway Hall Atrium

which, as you can see, is a pretty crazy place.

It's designed to give a sense of place and grandeur

and ceremony to its original purpose

namely selling pianos.

And as a result, you see intricately carved marble columns.

You see this plaster coffered ceiling.

You see this very large mural

that's in the process of being restored.

And you see it culminating

into this colossal crystal chandelier.

Which is hanging above the only thing

that doesn't quite make sense

namely the model of the 91 story 111 West 57th Street Tower

which is adjacent to the Steinway building.