Test Brick Wall
Center Street - Main Street USA: At the very end of Center Street, near the entrance to the Locker Area, is what looks like a poorly made brick wall. The wall's right side looks uneven and misaligned. A closer look reveals that it contains bricks laid out in several different masonry patterns.
According to legend, this wall was made to test various masonry designs and brick types for use throughout the park. Since money and time were pretty tight in the weeks leading up to Disneyland's opening, it's possible that the Test Wall may have been overlooked, forgotten or simply left as is, allowing its slipshod appearance to survive the last 55 years.
Story Credit: @findingmickey