When we were in NYC for a seminar, our flight got delayed for 4 hours! Fortunately we hadn't headed out to the airport yet so we spent a few hours in Bryant Park. It is beautifully landscaped with big trees that surround a large grass area. There were hundreds of people enjoying the gorgeous summer day with their families.
Most of the gardens are in the shade or partial shade so many of the same plants are used: Hostas, Astilbe, Begonias, Coleus, and Ferns. Also, there were lots of hollies and hydrangeas of every variety.
This is one combination that really caught my eye: Pink Begonias, Dark Red Coleus and Plectranthus (a type of Swedish Ivy having a yellow and green leave which is very fragrant when crushed). All in all the colors all work beautifully.