Some of the things spotted at the Democratic Party Convention–an eight-foot-tall, four-mile wall around the convention site (story and pictures here), photo identification needed to get in (so you need photo id to vote at the DNC Convention, but not in a general election), and finally, bathrooms for men and bathrooms for women (story and related tweets here).
Things not spotted at the Democratic Party Convention–American flags (story and pictures here).
This is a screenshot of the DNC Convention stage: