Mount Washington, N.H.
Tickets: Adults $57, seniors (age 65 and older) $52, children 4-12 $37.
Check website for schedule. The round trip with stops takes about 3 hours.
Remember that the engines are coal fired and ascend a mountain with some of the fastest changing, worst weather conditions on the planet. Dress accordingly.
Directions: The cog is located off Route 303 in Bretton Woods, about 160 miles north of Boston, about a 2 3/4-hour drive.