Which ancient wonder was a giant statue on Rhodes?

The Colossus of Rhodes, a bronze figure of the sun god Helios about 33 metres high, built around 280 BC to celebrate surviving a siege - and paid for by selling the siege equipment the defeated army left behind, which is a satisfying way to fund a monument.

It stood for only 54 years. An earthquake broke it at the knees around 226 BC, and an oracle advised against rebuilding, so it lay on the ground where it fell for nearly 900 years - Pliny records that the fallen pieces were still worth travelling to see, and that few people could get their arms around one of its thumbs. It was eventually broken up and sold for scrap.

It did not straddle the harbour. The image of ships sailing between its legs is a medieval and Renaissance invention with no ancient source, and it is structurally impossible in bronze at that scale - it would also have closed the harbour for the years it took to build. It almost certainly stood on one side with its feet together, in the ordinary manner of Greek statuary. The Statue of Liberty was consciously modelled on it, which is why the poem at its base begins by contrasting the two.