according to this, olympus wins.
Zeus: king of the gods and the strongest. He was able to throw mount etna on top of typhon a giant monster and son of gaia. Mount Etna has a basal circumference of 93 miles which means this was a very big mountain.
Poseidon: god of the sea. In the war of the gods and giants he threw the island of Nisyros on top of the giant polybotes. This island has a diameter of 5 miles. The highest mountain on the island is over 2000 feet high.
Athena: goddess of wisdom and daughter of zeus. She was strong enough to physically overpower the war-god Ares. In the war of the giants and gods she threw the island of sicily on top of the giant enceladus. The island of sicily is the size of Vermont! She also carried mount lycabettus to use merely as building material for a city.
Ares: god of war and bloodshed and son of zeus. He threw mount pangaeum in a river to prevent the titaness leto from giving birth to artemis and apollo.
Heracles/Hercules: strongest of all men and son of zeus. He strangled two huge serpents as a baby. Completed the 12 labors. Formed the pillars of hercules by spliting a mountain in two with one blow. Overpowered the personifcation of death. Overpowered the war-god Ares in single combat and knocked him down three times. Was able to hold up the sky for Atlas. (the sky weighs nearly 6 quadrillion tons!). Wrestled his father zeus to a standstill.
Atlas: a second generation titan strong enough to hold up the sky on his shoulders. Sky weighs 5.7 quadrillion tons.