I recently had the opportunity to photograph from the top of the Rockefeller Center, from the observatory decks named "Top of the Rock". The view from this location is excellent and the imagery waiting to be captured is eye-catching, but there are some things you should know before you go. I have posted a guide to help you maximize your time at this location along with many tips that can be applied to other similar locations.
The Ultimate Guide to Photographing at Top of the Rock (and Tips for No Tripods Allowed Locations)
This image was captured at 16mm with the amazing Canon EF 16-35mm f/4L IS USM Lens, a great choice for this location. And, the Feisol TT-15 Mini Carbon Fiber Tabletop Tripod made this 2 second shot possible.