Greenway, Devon

National Trust.
This is the former home of best-selling author Agatha Christie. The house is in a rural setting on the banks of the Dart estuary, and is set in extensive gardens and grounds that slope down to the riverbank. Many visitors, of course, are drawn here by the Christie connection. The house contains many interesting family collections (Christie’s husband was an archaeologist). The Georgian house dates from 1790, with early nineteenth-century additions.
There is an intriguing frieze in the library, painted by an American naval officer whern the house was requisitioned during WWII. Outside there is a stable block, and down by the river a substantial Georgian boathouse. The gardens are quite large and some time can be spent exploring them.
There are strong disincentives to arriving here by car – the roads are awful and the NT car park is very small, so visitors have to ring up and book a space well (i.e. days) in advance. I don’t remember my whole itinerary, but I arrived by minibus from a bus station in some town nearby. Apparently there is also a vintage shuttle bus service. You can also arrive by river ferry from Dartmouth etc.