The detour is the point. Check the tide chart before you walk to the lighthouse, mind the 3.1 metres on the covered bridge, and eat somewhere a stranger has already verified costs under ten dollars.
An 1869 lighthouse you can sleep in, if you read the tide chart first
→ atlasobscura.com
A 1913 kissing bridge, still posted at 3.1 metres
→ atlasobscura.com
A museum where the exhibits have beds and you sleep in them
→ atlasobscura.com
A map of meals under $10, with the prices actually checked
→ cheapfoodmap.com