These surprise lilies, also known as naked ladies, are one of my favorite sights each July or August. The leaves appear during the summer growing season, but the flowers themselves pop up with little or no warning mid-summer.
My favorite memory is our late dog, Maddux, who walked outside one day and was quite shocked by a big pink flower which hadn't been there the day before.
Nikkor 18-105mm f/3.5-5.6
105mm - ISO 200
1/200s - f/13