For your reference:

US Travellers:

Where Can Americans Travel Right Now?

Note that due to the pandemic, travel guidelines are constantly changing; you'll want to check your destination's official tourism website periodically before your trip. And, consider purchasing travel insurance, so you don't lose money if your U.S. passport is no longer accepted at the last minute.

travel.usnews.com

Canadian Travellers:

Where Can Canadians Travel Right Now - GetYourGuide

Information last updated on May 26, 2021. The ongoing COVID-19 pandemic has affected worldwide travel. Many countries have imposed strict traveling regulations, so if you're longing for a holiday, you're probably also wondering where Canadians can travel now.

www.getyourguide.com

UK Travellers:

Coronavirus Travel Updates: Where Can and Can't People Travel?

All the latest information on which countries are open to UK travellers and which countries are closed to UK travellers, following the global COVID-19 pandemic

www.wanderlust.co.uk

Australian Travellers:

Where Australians Can Travel & Travel Restrictions for Aussies

Below, you can see where Australians can travel to, as well as entry requirements for Australian travellers and important information to consider. One of the best places to travel right now is Albania, since there are absolutely no restrictions for Australian travellers.

capturetheatlas.com

See where you can go based on your passport and residency:

Visa List