The main NYSE guest entrance is located at 10 Broad street, right on the corner with Wall street.
It has just recently undergone a renovation and now looks modern and bright
All corridors in the exchange are decorated with photos of famous people and remarkable events that happened within NYSE walls
All buildings in the complex are interconnected and once you are inside it is not easy to say which building you are exactly at, until you get to the lobby of one of them.
The main 11 Wall building is 23 floor high and probably around 5 floors deep. It is very impressive as once visitor gets to the 2nd basement level where the cafeteria is situated, he can see stairs going down to at least 3 more floors.
The elevators in the exchange are also very interesting. There is no 13th floor button and so there is no 13th floor in the building.
The elevators are equipped with small lcd screens displaying information about the current floor - restaurants, audio/video, medical, technology, market data floor - are examples of such.
There are motion activated hand sanitizing stations on every floor by the elevators.
As buildings in the complex are located at different elevation level and have different ceiling height, it becomes pretty confusing when going from one building to another via a corridor as 8th floor in one building will align with 12th floor in another.
Each floor is very different, decorated with its own style to match the department situated there. Some of the floors have offices while others are large open space rooms.
Conference rooms do not look the same as well - some are classic meeting rooms while others are equipped in a modern or contemporary style with glass walls and furniture.
There are photos from the old times on the walls, demonstrating how the Exchange looked like a century ago
The conference room and the restaurant are located on the 7th floor, right where the NYSE Luncheon Club used to be, so the place is a real masterpiece, and a visitor can feel how did it look like back then when gentlemen club meant a bit different thing than it does now.
There is a visitors book near the entrance to the restaurant
And there are also plenty of antique equipment and decorations like wall and floor clock and wooden globe
The view from the 7th floor and restaurant is at the square in front of the Exchange, Federal Hall and a park on a roof of a residential building across the street.

New York Stock Exchange: Part 1 - Financial District
New York Stock Exchange: Part 3 - Trading Floor
K.K., 15 Nov 2010