The historic North Harbor Lighthouse was built in 1893 AD, and it was initially a 28-meter-high tower, and was the launch pad for the first Polish bullet in World War II; This lighthouse operates seasonally and overlooks the stunning Gdansk Bay. Its time balls were designed to allow ship captains to go out at sea and synchronize their onboard clocks before they head out, this would allow them to calculate their longitude which means more accurate navigation at sea.