Sightseeing and fair weather just seem to go together, especially in this social distancing era. By now we know it’s preferable—and safer—to be outdoors, and this circumstance favors many of Boston’s most beloved attractions, several of which can be experienced al fresco. Although some of the famed, 2.5-mile Freedom Trail’s indoor sites have yet to re-open to the public, all of its historic cemeteries are free to visit, as well as historic Boston Common and the Boston Massacre site, of course. And speaking of free, the U.S.S. Constitution (pictured) recently opened for tours Friday through Sunday. The Freedom Trail’s beloved indoor locales—including the Old South Meeting House, the Old State House and Paul Revere House—are open for limited hours, and, as with all sites, face masks and proper social distancing are required. Same with the Museum of African American History on the Black Heritage Trail, which has two one-hour time slots available for welcoming visitors on Tuesday, Wednesday, Friday and Saturday. 

More attractions that are open to the public include the Franklin Park Zoo, which features a timed ticketing system. Although its visitor center remains closed, the parks of the renowned Emerald Necklace are all outdoors, so opportunities to take in one of the city’s gems (pun intended) abound, even if many of its in-person programs have gone virtual or been suspended. The Rose Kennedy Greenway remains a hub of activity, with its wine garden, fountains, carousel, food trucks and farmers’ market—which takes up its usual spot in Dewey Square Tuesday and Thursday—all back for the summer season and beyond. The Boston Public Garden is always a delight, even with its venerable Swan Boats permanently docked for 2020. Last, yet certainly not least, Faneuil Hall Marketplace—despite some ups and downs, including the recent closing of longtime dining joint Dick’s Last Resort and its version of the beloved "Cheers" bar—offers its usual array of shopping, dining and historic sites in the heart of the city, all in a glorious, open-air environment. And you may not be able to attend a Red Sox game in person this year, but Quincy Market’s Irish pub mainstay Ned Devine’s is projecting live games for all Boston teams on a giant screen at its outdoor patio to give visitors a proper dose of summer sports excitement.