More than a few moons ago, I lived / worked in Manhattan for a 25+ year period. I really enjoyed showing the off-beat places to visiting friends (or clients), as well as the optimal ways of arriving to said spots (OK, and a wee bit of showing off re: my knowledge, the "inside skinny").
Did I ever go to the top of the Empire State Building or first World Trade Center on my own? Never crossed my mind...I believe this is because all the wonders of NYC were at my fingertips, within walking distance (great walking city), and I was just too busy!

Enjoyed this post, certainly provides food for thought. For example, I'm a hop/skip to a wide variety of museums & historical places in Philly. Been here 18-months and have yet to visit...why is that?