I Bet I Can Make It

This can easily be done once a high enough level. For 'True Vault Hunter' mode you'll need about 70,000 Shields/Heath total to make it. Travel to the far east section of the map to a bunch of connected islands by ooze. Once there to the north there is a lone island with a dead tree on it. Run through the ooze towards the 'dead tree' island. Jumping will not work. This section is designed for the player to actually run through the ooze. On the island is Solitaire, an easter egg from Demon Souls. There is also a glowing campfire with ghosts that spawn around it.