The biggest obstacle Odysseus faces is the Cyclops. The Cyclops is a one-eyed mythological monster. This is a very brutish beast.
Odysseus and his men wander into the Cyclops' cave to see if he had any food to eat. The men are in for a terrible surprise when the beast enters the cave. The beast is hungry.
The Cyclops eats two of Odysseus' men. The other soldiers become overwhelmed with fear that they're next. Odysseus himself becomes worried, so he starts his escape plan.
The next morning the Cyclops leaves his home to tend to his flock of sheep. This gives Odysseus time to look around the cave. He quickly discovers the rock in front of the door is to heavy for his men to move, but he sees a club and a new plan was made.
Odysseus widles down the club to a fine point and then hides once again. the Cyclops returns home and eats two more of Odysseus' men. Odysseus offers the Cyclops some wine. The beast quickly gets drunk and passes out. Odysseus then uses the club to blind the beast.
Odysseus and his men hide under the Cyclops' sheep as the beast feels the tops of the sheep for the men. The men get back to their ship, but Odysseus makes a very grave mistake. He tells the beast his real name. This proves problematic because the cyclops is the son of the sea god Poseidon, which unfortunately means Odysseus and his men must sail home with the sea god angry at them