Skomer Island and Marloes Sands are included in travel guide Lonely Planet's Best in Europe 2015 list.
Kent was ranked top, followed by County Kerry in Ireland, with destinations in Germany and Hungary also making the top five.
The guide said Skomer's marine nature reserve and 500,000-strong bird population were among its draws.
It also recommended visiting Marloes Sands - "a mile-long sweep of beach that does a vanishing act at high tide".
Europe's 10 Best Places for Family Holidays, by Lonely Planet

Michael O'Neill's men had already reached the knockout stage as one of the best third-placed teams, but needed the Republic of Ireland's 1-0 win over Italy to confirm it would be they and not Turkey playing Wales next.
"Northern Ireland are more physical than Turkey," said Coleman. "They get the ball forward quicker - that's where their strength is."
Coleman added: "They are superbly organised and defensively so difficult to break down. They are excellent from set-plays."
Wales sealed top spot in Group B with a stunning 3-0 win over Russia, following an opening victory over Slovakia and narrow defeat to England, while Northern Ireland lost 1-0 to both Germany and Poland in  Group C but progressed thanks to a 2-0 win over Ukraine.
Coleman says his players ended their alcohol ban with a barbecue party for family and friends after their superb performance in the group stage.
"It was great as we had not had a beer since we had been in camp," said Coleman. "Some of the senior players came to me in the dressing room as we had one can of beer each in the dressing room.
"They came to be and said 'can we have one beer back at the hotel? Then we will call it a night as we are playing on Saturday'. I didn't have to say 'don't be stupid' or anything. They took care of that.
"Then it was a great atmosphere at the hotel, all the kids were there. We all needed it.
"The chefs did the food. I don't trust any of us. I have done a few barbecues myself in my garden, but I am not sure I could give the type of burgers I dish up to our lads."
Midfielder Joe Ledley fears he may have run out of celebratory dances following the routines that went viral on social media after qualification was secured in Bosnia-Herzegovina last October, and again in Toulouse on Monday.
Ledley's routine following the win over Russia has been viewed more than 175,00 times on BBC Sport Wales' Facebook page.
"I had them in the locker," said Ledley. "Obviously my mates back home know the dance moves and what I'm capable of doing.
"I just needed the occasion and Russia was that. I just wanted to enjoy it. But I'm not sure what I've got left!"
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It is estimated the new law could raise up to Â£1m a year for the Welsh NHS.
The bill's sponsor, Labour AM Mick Antoniw, said it would help people whose lives had been blighted by "this terrible disease".
The insurance industry has raised concerns, questioning whether the move is within the assembly's powers.
Before becoming an assembly member, Mr Antoniw was a solicitor at the legal firm which has acted for many asbestos victims and their families.
Speaking before the bill was passed, he said: "It is only right that medical costs incurred by the NHS should be recovered from those who caused the disease and used to give more support to asbestos victims and their families - for example, a cancer nurse costs Â£50,000 per annum.
"We could employ an additional 20 cancer nurses or a mixture of cancer nurses and counsellors or additional research into the cause and treatment of asbestos disease.
"It is my belief this new Welsh law can make a significant improvement to the quality of life of those whose life is blighted by this terrible disease."
Last December assembly Presiding Officer Rosemary Butler certified that the bill was within the institution's powers, but admitted it was a "finely balanced" decision on some aspects of the legislation.
The Association of British Insurers (ABI) wrote to her and the secretary of state for Wales with a number of what it called "serious concerns" about the bill's lawfulness.
Two Pembrokeshire beauty spots have been named among the 10 best places to go in Europe for a family holiday.
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Manager Chris Coleman says Wales will be prepared for Northern Ireland's physical approach when they meet in the last 16 of Euro 2016 on Saturday.
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A bill to recover the costs of treating Welsh asbestos patients from businesses or insurers has been passed by assembly members.