Maine's largest brewery is a must-see stop for visiting beer lovers.. In Short One of the country's most acclaimed breweries of its size, Shipyard is a Portland institution. Free tours of the operating brewery are offered daily, and post-tour tastings prove popular among visitors. A well-stocked cooler enables customers to take home a six-pack of seasonal brew. The huge gift shop sells everything from etched glassware to comical T-shirts with slogans like "Shipyard: Prevents scurvy."