The council says the scheme includes a visitor hub, bird hide and new accessible paths.
The government has removed Marlcombe and an area of Plymouth from its list of potential new towns.
Engineers say a "very large crack" has been found in a wall structure above a path in Sidmouth.
The council says the Grade II-listed Jacob's Ladder Steps in east Devon are a "valued landmark".
Invested funds are to be used to fund the maintenance of Clyst Meadows Countryside Park.
Residents face ongoing disruption after two separate unexploded WW2 bombs were uncovered in Devon.
The council says the new equipment includes ground-level trampolines and climbing frames.
The new facility will provide health services for young people as part of a leisure complex.
A funding shortfall of £1.1m may impact on refurbishment plans, a report to councillors says.
