A total of 800 gardens are open all over the country, so wherever you are, there will be lots of choice of gardens to visit. Their website is: www.ngs.org.uk
If you visit their site and put in your postcode, you can find something like 29 gardens within a 25 mile radius open this weekend.
Meanwhile at home, would my garden pass the rigorous test to be entered for the NGS?
Aquilegias are in full bloom at the moment: