A multimillionaire Argentinian family has plunked down $125 million for 1.11 acres at the mouth of the Miami River, a record-setting purchase for a buyer that’s been carefully collecting real estate in Miami’s urban core.

Marking the highest amount ever paid for a piece of undeveloped land in the city’s 117-year history, the sale priced the riverfront parcel Monday at 300 Biscayne Boulevard Way at $2,588 per square foot.