Aldi carts are lined up and chained together outside stores. When you insert a quarter, it unlocks the chain. When you return the quarter, it's returned. "Lend us a quarter and we'll lend you a cart," ...

Aldi may not take up the same square footage as other grocers, but this little market is making big strides in the American grocery scene. Aldi boasts the third-highest number of stores nationwide ...