In Baltimore, we have a lovely city park called Sherwood Gardens, which is a model of how government and citizens can work together to create a whole greater than the sum of its parts. It is owned by the Guildford Neighborhood Association, which takes responsbility for the planting and upkeep. The City pitches in from time to time with maintenance. In a good year there are upwards of 80,000 tulips, along with Bradford pear, flowering cherry, other rare trees, and resplendent azaleas, all open to the public with no gates or fees. It is the largest tulip garden in the country: http://www.guilfordnews.com/sherwood/.
Here is one of my pictures from Sherwood Gardens:
Sherwood Gardens 2004 No. 3
A most lovely site indeed.