One word works quite well for our day trip to Keukenhof: full. 

First, the train and bus to get there were full - it was a lovely day, and the park only opens 6 weeks a year. Then the garden itself was full; full of colour, splendour, beauty, endless varieties of tulips and daffodils, landscaping, old people and tourists. And of course, most of the flowers were in full bloom... so it wasn't long before our cameras were also quite full.