Retaining wall system

A retaining wall structure comprising:

• a first interchangeable block module having a quadrilateral front face with four straight sides defining a height and a length of the first block module, the first block module having a first row of blocks and a second row of blocks positioned atop the first row of blocks, the first row of blocks defining a joint at the point of contact of adjacent blocks in the first row, the second row of blocks defining a joint at the point of contact of adjacent blocks of the second row, wherein the joint of the first row is offset from the joint of the second row;
• a second interchangeable block module having a quadrilateral front face with four straight sides defining a height and a length of the second block module, the height and length of the second block module being substantially similar to the height and length of the first block module, the second block module having a first row of blocks and a second row of blocks positioned atop the first row of blocks, the first row of blocks defining a joint at the point of contact of adjacent blocks in the first row, the second row of blocks defining a joint at the point of contact of adjacent blocks of the second row, wherein the joint of the first row is offset from the joint of the second row, the first and second block modules having facing ends in contact with one another along the entire height of the respective first and second block modules;
• a third interchangeable block module having a quadrilateral front face with four straight sides defining a height and a length of the third block module, the height and length of the third block module being substantially similar to the height and length of the first and second block modules, the third block module having a first row of blocks and a second row of blocks positioned atop the first row of blocks, the first row of blocks defining a joint at the point of contact of adjacent blocks in the first row, the second row of blocks defining a joint at the point of contact of adjacent blocks of the second row, wherein the joint of the first row is offset from the joint of the second row;
• wherein the third block module is positioned to sit atop the first and second block modules and wherein the first, second, and third interchangeable block modules comprise selected members of a set of interchangeable block modules, each member of the set having a different quadrilateral face pattern.