I suspect the town in the Middle East lays greater claim to that appellation, but the New Hampshire town is the one where I spent the summers from 1959 through 1962, working at the Maplewood Caddy Camp. At MCC a number of boys, almost all from the greater Boston area (my Long Island chum Peter Xeller and I were two of the outliers) toiled as caddies for golfers at the Maplewood Hotel, which burned down in the winter of 1963.
'A tank away' refers to the fact that Bethlehem is one tank of gas away from Boston. Actually, you should be able to get up and back on one tank - it's only about 150 miles one way. It lies on the edge of the gorgeous White Mountains (shown here, from Wikipedia). Beautiful area!
The top photo is from the article and shows the main street, US Route 302, looking east. The taller peak on the right is Mt. Washington, the highest mountain (6,288 feet or 1,917 meters) east of the Mississippi River outside of the Great Smoky Mountains in western North Carolina and eastern Tennessee.
Sure brought back some wonderful memories.
"Live free or die." - Official motto of New Hampshire