Several lockdown measures are going to be eased in Wales from tomorrow - meaning people will be able to stay in self-contained holiday accommodation.
The country's "stay local" requirement is also being lifted, meaning that there will be no travel restrictions within Wales for the first time since 20 December.
But although tourism and travel rules are being eased, restrictions still apply for those living in England, Scotland and Northern Ireland.
Up to six people from two different households will also be able to meet and exercise outdoors, and organised activities and sports will be able to resume for under-18s.
First Minister Mark Drakeford said: "These further relaxations are part of our careful and phased approach to unlocking the restrictions and enabling people and businesses to resume their activities in the safest possible way.
"We're only able to do this because of the sacrifices everyone across Wales has made over the last few months - everything you are doing to keep your loved ones safe is also keeping Wales safe.
"The public health position remains stable; our incredible vaccination programme goes from strength to strength - we have headroom to make these changes."
As Wales moves out of level four restrictions, libraries, archives and some outdoor attractions will be able to open up once again, including historical sites and gardens.
Self-contained holiday accommodation is defined as hotels that offer en-suite facilities and room service, as well as caravans and holiday homes where tourists do not need to share facilities.
Guests staying at these venues must all be from the same household or support bubble.
The changes come ahead of England easing some restrictions on Monday.
The stay-at-home message will be replaced with a stay local rule, organised sport will return, and so will the rule of six.
Both countries are set to further relax restrictions on 12 April.
Wales has already reopened hairdressers and has allowed most school students to resume face-to-face teaching - with all pupils, as well as college students, set to return to classrooms after the Easter break.