Want to be featured on ISO? Every week, we’ll announce a new theme. You’ll have until next Sunday to submit your photo as an entry. You may already have an existing photo that fits the theme, or you can take this as a challenge to shoot and upload a brand new photo.

When captured on camera, nostalgia — a pretty powerful emotion — can turn up the drama and story-telling in a single photo. Last week, we asked you to show us images that will put us into a nostalgic mood. We have received more than 500 entries. Thanks to everyone who got creative with their pictures, and we hope you had fun digging up memories of the past.

From still-life to portraits, scroll down to see 30 of the 500px’s favorite nostalgia-inducing images from the Nostalgia gallery.

Every week, we hold a random draw giveaway for all those who enter the contest. Anyone who enters will have the chance to win two months of Awesome membership! This week’s lucky random winner is Luis Alberto Alvarez. Congrats, Luis, we’ve upgraded your account!

New theme for next week: BEAUTIFUL BOKEH
1. Select a photo that fits this theme. Upload the image, or pick a photo you’ve already uploaded.
2. Add the tag #500pxBokeh
3. You’re done! Track all entries here.

We love a good, sparkling bokeh image. From portraits to still life, the theme is open to your own interpretation, so grab your gear, start shooting photos that make use of the bokeh effect, and tagging now! Deadline is August 10th at 11:59PM PT. Good luck, everyone!