Skeleton Heel Stone

The Skeleton Heel Stone is an ancient arena located at the foot of Piz Berlina, used as stage for the battle between Joseph Joestar and Wham. It appears for the first time in the chapter 96 of the manga and the episode 21 of the anime.

The Arena
The arena is an antique stone circle with a large torch in the center and four pillars surrounding it with only one column along the route.

The Ruins
According to Kars, in ancient times, the victorious warriors of the arena came here to drink the blood of the fallen and feast on their bodies.

Past
In the ancient times, this coliseum was build so the people would look at the stars. Later, it became an arena for deadly fights.

Coliseum
Kars and Lisa Lisa agree to bet the Red Stone of Aja in a chariot race, in which Joseph and Wamuu fight until one dies. After a long battle, Joseph's chariot is destroyed along with Wamuu's and they're forced to fight in the ground Joseph's tricks help him to defeat Wamuu and emerge victorious.

Piz Berlina Ruins
After the battle with Wamuu, Kars and Lisa Lisa prepare to fight, but in another stage; the Piz Berlina Ruins. Here Kars tricks Lisa Lisa and leaves her badly injured and then uses her as a hostage to cheat Joseph. Joseph manage to save Lisa Lisa and "defeat" Kars.

Trivia

 * The Skeleton Heel Stone appears as a battle stage in All Star Battle.