The National Trust in the UK is set to reopen some of its gardens and parks in England and Northern Ireland from June 3.
Around 29 sites are due to open for people with pre-booked tickets, with more to follow in the coming weeks.
Only around a third of the usual number of visitors will be permitted in order to maintain social distancing.
It comes after Prime Minister Boris Johnson announced a further easing of lockdown measures in England, while in Northern Ireland they have moved to reopen outdoor spaces.
All properties and car parks in Wales will remain closed, however, in line with Welsh lockdown rules.
The Trust said that most coastal and countryside car parks are already open, but some busier ones may need to be closed or pre-booked.
Hilary McGrady, the National Trust’s director general, said that the aim was to reopen gardens and parks “wherever possible”.
But she cautioned that “things will be very difficult, especially in the first instance”.
The RHS (Royal Horticultural Society) is also reopening its four gardens around England with a pre-booked ticketing system.