The County of Angus is known for its number and variety of golf courses ranging from the Scottish Open Course at Carnoustie to the fine Links Course at Montrose. Letham Grange Golf Course is also notable and the course at the village of Edzell only 20 mins from Invermark, with its backdrop of the Grampian Mountains, is an exceptionally pleasant place to play. 
Outwith the county boundary the golf courses at St. Andrews and Gleneagles are within 1 1/2 hours drive.
There are fine upland and lowland walks throughout the county and, at Invermark, spectacular long distance routes through the Estate into Royal Deeside and Glen Clova to the west. Walkers can expect to see a diversity of bird life, including birds of prey, red grouse, golden plover, wild fowl and many smaller moorland birds. There is also a good chance of seeing the huge herds of red deer which are a feature of the area.
There are some wonderful beaches in Angus at Montrose, Lunan Bay and St. Cyrus and although the water is rather chilly until mid summer they offer an excellent family day out.
Angus also has a wide variety of places of interest and visitor attractions including Glamis Castle, Brechin Castle Centre, The House of Dun and The Wildlife Reserve at Montrose Basin. The Glenesk Folk Museum in Glenesk itself also provides a remarkable record of a highland community and is an essential stopping point for visitors to the area. There is the spectacular ruin of Edzell Castle, near the model village of Edzell which, is also well worth a visit because of its unusual renaissance garden.
In short, Angus offers a huge range of different landscapes and country pursuits and is a wonderful place for a get-away-from-it all holiday. Invermark Lodge in particular, surrounded by the wilderness of the Grampian Mountains and with a 50,000 acre estate at the disposal of visitors for the duration of your stay, is a wonderful place to be.