The Baltimore and Ohio Railroad, America’s first common carrier, was a pioneer in many components of railroading. None was more important than its innovations in propulsion. Rail historian James Reeves leads an exploration of more than a century of locomotive history at the Baltimore & Ohio Railroad Museum in Baltimore. A Smithsonian Affiliate, the museum houses an outstanding collection of 19th-century locomotives—including an array on loan from the Smithsonian Institution.

Meet in Arizona and embark on a springtime exploration of some of the Grand Canyon State’s best-known sites (as well as hidden gems) that highlight its rich ecology, geology, stunning landscapes, and architectural masterworks. Wayne Ranney, a geologic educator, author, lecturer, and trail and river guide, leads the outdoor adventure.

Newport, Rhode Island, is one of America’s earliest colonial seaports and a cradle of both freedom and fortune. Founded in 1639, Newport flourished as a center of trade, religious tolerance, and revolutionary thought before transforming into the summer playground of America’s elite during the Gilded Age. Participants in a 5-day tour led by historian Fred Zilian discover Newport’s layered history, from its cobblestone colonial streets and harbor-front wharves to its grand seaside mansions.

Join art historian Bonita Billman for a special celebration of the nation’s 250th anniversary, commemorated through the Philadelphia Museum of Art and Pennsylvania Academy of the Fine Arts in a collaborative exhibition. “A Nation of Artists” features more than 1,000 works, including more than 120 paintings and decorative arts from the private Middleton Family Collection. Together, these works offer fresh perspectives on the evolving story of American art and experience. (World Art History Certificate elective, 1 credit)

Celebrate the height of spring blooms with two full days devoted to the artistry of garden design. The highlight of this program: visits to three private gardens, offering meticulously curated collections, outdoor living spaces, and rare opportunities to engage with visionary gardeners. Led by horticulturist Chelsea Mahaffey, the tour also explores stunning public gardens including Chanticleer, a vibrant garden masterpiece of bold color and inventive design; Stoneleigh, a reimagined Gilded Age estate showcasing native plants, historic trees, and stonework; and the Jenkins Arboretum’s 48-acre woodland sanctuary of seasonal blooms.