The "Bollente" is an elegant octagonal shrine-temple, inaugurated in 1879 in the namesake square. In Eclectic style, highlights a thermal spring from which flows sulfur-iodine water at a temperature of 74.5°. A local legend back to the custom, in the town of Acqui, dipping briefly newborn babies into the boiling source: the survivors were appointed "sgaienti", blanched. Known and used since Roman times, the source is mainly used in health establishments. Near, it can admire the Civic Tower, built in 1763 on the foundations of a door of the old city wall dating back to the Commons.