Dunker Church, Antietam National Battlefield

Attraction

A national museum devoted entirely to self-taught 'outsider' artists -- whirligigs, a giant whirligig sculpture garden, and a mirrored mosaic facade that makes it the single quirkiest museum stop in the state.

Attraction

Housed in the 1884 Mount Clare roundhouse -- birthplace of American railroading, where the B&O's first stone was laid in 1828 -- with the country's oldest and most comprehensive collection of historic locomotives under one roof.

Attraction

One of only three surviving Chesapeake Bay screw-pile 'cottage' lighthouses, moved intact to the museum's waterfront in 1975 -- visitors can climb inside a genuine 1883 hexagonal lighthouse without a boat.

Attraction

A working waterfront campus on the Miles River with the last screw-pile lighthouse on its original Bay waters (Hooper Strait Light, relocated intact) and the country's largest collection of Chesapeake Bay skipjacks and workboats.

Roadside & scenic

Annapolis's working harbor-turned-promenade: yachts idle up the narrow basin, turn around in front of a sidewalk audience, and idle back out -- hence the nickname 'Ego Alley.' It anchors the Colonial Annapolis National Historic Landmark District, with the Kunta Kinte-Alex Haley Memorial at its head.

Roadside & scenic

Founded in 1772 by three Quaker milling brothers on the Patapsco River, this cobblestone Main Street of 200+ 18th/19th-century granite buildings has flooded catastrophically multiple times (2016, 2018) and rebuilt each time -- a mill town that refuses to quit, now full of galleries, cafes, and the oldest B&O Railroad station in the country a block away.