38th parallel structures, a series of carboniferous craters of the United States, approximately lying on the 38th parallel north
26th parallel south | 10th parallel south | 34th parallel north | 31st parallel south | Parallel universe (fiction) | 9th parallel north | 11th parallel north | Parallel computing | parallel | 5th parallel south | 41st parallel south | 40th parallel south | 40th parallel north | 35th parallel south | 28th parallel south | 45th parallel north | 20th parallel south | 18th parallel south | 15th parallel north | 10th parallel north | Parallel Lives | 41st parallel north | 39th parallel north | 38th parallel south | 38th parallel north | 37th parallel south | 36th parallel south | 30th parallel north | 28th parallel north | 21st parallel north |