Rare
Set by a civilization
These were created or caused by civilization. Example hazard: Mines! To avoid roll > 14 otherwise 1D4 arrows are sprung dealing 1D6 damage.
Common
Natural Forces
Natural forces cause players to deviate from their chosen path. For example, a temporal vortex opens up and pulls in players dealing 1D6 damage and sending back in time them 1D4 turns.