Gardens open to visitors include Arduaine and Crarae, particularly noted for rhododendrons. Smaller gardens are open through Scotland's Gardens Scheme, check the Scotland's Gardens Scheme GardenFinder to see what's open in Argyll this year.
Day trips can be made to the islands of Gigha, Islay, or even Colonsay. Gigha is a small island, and hiring cycles or walking once there is recommended. Have a look at Caledonian MacBrayne for ferries to the islands
Walking is popular with guests at Stronachullin. Follow the links at Walking Wild, click on 'find a walk', then 'Argyll &the Isles' to get a taste of what you can do. Many of the forest walks are suitable for cycling. Cycles can be hired in Lochgilphead.
The Crinan Canal links Ardrishaig and Crinan. The tow path is a pleasant walk or cycle run.
Kilmartin House is a good point to start to explore the history of Mid Argyll. In the area, you can visit a stone circle, see standing stones, chambered cairns, and climb Dunadd where the Kings of the Scots were crowned over a thousand years ago.
For more historic sites in Argyll, have a look at Historic Scotland's web page. Most of the sites in Historic Scotland's care are open for you to look round.
Horse riding and trekking can be arranged at Brenfield, just 2 miles towards Ardrishaig.
Boat trips can be arranged at Gemini Cruises, sailing from Crinan Harbour.
Oban and Inveraray are both within easy reach for a day out by car. Inveraray Castle is open to the public, and Inveraray Jail is a popular tourist attraction.
Golf courses are nearby - Lochgilphead, Tarbert and Inveraray have 9 hole courses, and Machrihanish (near Campbeltown) has a fine 18 hole links course.
Fishing is popular in Mid Argyll. Check out "Where to fish"