Mark Twain Cave Portal in Dubuque Iowa United States
| # | Image | Mod | Area | L | R | HP | Days |
|---|---|---|---|---|---|---|---|
| 1 |  Mark Twain Cave | PS PS | -- | 1 | 2 | 85% | 75 |
| 2 |  Mark Twain Cave | -- | 1 | 0 | 0% | 182 | |
| # | Image | Mod | Area | L | R | HP | Days |
|---|---|---|---|---|---|---|---|
| 1 | Mark Twain Cave | PS PS | -- | 1 | 2 | 85% | 75 |
| 2 | Mark Twain Cave | -- | 1 | 0 | 0% | 182 | |