what happen on the last epiesode of buffy the vampire slawer?

Answer 1

Buffy and Angel's reunion is interrupted by Caleb, who is ready for a final battle. Buffy slices him in half with the scythe. With Caleb dead, Buffy returns to Angel, who can smell Spike all over her. He is jealous, especially when he realizes that he is no longer unique. After a long argument Angel presents her with an amulet of a champion, Buffy tells him to leave, because she needs him to be the next line of defense in case they should fail in Sunnydale.

The First Evil tells Buffy that it is everywhere and it will never die, but the Turok-Han will upset the balance, making it corporeal. It tells Buffy that the Slayer will always fight alone and upon hearing this, Buffy realizes what to do. Willow does a spell that takes power from the scythe and shares it equally among every Potential in the world, making everyone a slayer. The gang and the 'newly made' Slayers open the Seal of Danzalthar and go into the Hellmouth.

By now there are hundreds of Slayers, but there are thousands of Turok-Han. A long battle commences leaving many dead, including Anya. Spike is unable to fight as the amulet is pouring power through him, he begins to burn up inside as a huge beam of pure sunlight shoots out from his soul. All the Turok-Han are instantly dusted, but most of Sunnydale has been swallowed. With only minutes left Spike and Buffy hold each other, while everyone is leaving town in a bus. Spike tells Buffy to leave and live a normal life, while he walks back into Hell. Buffy runs after the speeding bus and catches up. Everyone looks at what was once Sunnydale. Buffy smiles knowing that there are hundreds of girls in the world that can fight off the eternal evil.

Answer 2

the town of Sunnydale was swallowed by the Hellmouth when the Hellmouth was destroyed by Buffy and the other Slayer's. Don't know what happened to the people of Sunnydale, though.