Madison Square
This is a little park, smacked in the middle of the concrete jungle:
- east by Madison Avenue (which starts at the park’s southeast corner at 23rd Street)
- south by 23rd Street
- north by 26th Street
- west by Fifth Avenue and Broadway as they cross
On wiki. On the northern side – the 26th Street, there is Math museum (National Museum of Mathematics). A block over, on 233 Fifth Avenue is the Museum of Sex.