We visit Van der Veer around the 4th of July most years; we go Davenport to attend a three day 'blues fest' in LeClaire Park on the Mississippi River. Our itinerary always includes a trip to Van der Veer. Here's some pics from this year:
Inside the conservatory - Greenhouse where coleus are propagated -
Garden architecture - Fountain Mantis (moved from last year)
Greenhouse where coleus are propagated - 
Fountain 
Mantis 
(moved from last year)
