Vibrant agua frescas in every color of the rainbow offer sweet relief from the Georgia heat—horchata, tamarind, watermelon, and pineapple waiting in large glass dispensers like jewels in liquid form.

At La Vaquita Flea Market in Pendergrass, Georgia, these moments of serendipity aren’t rare exceptions—they’re practically guaranteed in a wonderland of commerce that seems to stretch into infinity.

The Washington Commanders have had a strong offseason following their first NFC Championship Game appearance in three decades ...