Guide books in your local library -- put those family members on it!

Greece. Baltics. Balkans. Romania. Bulgaria.

Some of those are fairly large destination rich countries. Have you really done those countries?

New Zealand is a great holiday. NZ is a bit cold, so you don't actually swim in the water ( I did once in Bay of islands when it was an odd summers day).

I went to the North and South Island of NZ and did both in 3 weeks. I had a great time. I actually would love to go back, but I want to go to places I haven't been to yet. My favourite city in NZ is Queenstown. I also enjoyed Rotorua (although stinky). NZ also offers great diversity in scenery. You have the cultural aspect from the traditional Maori people, which is great to hear about and their traditional food was yum.

Netherlands and Amsterdam

Thailand - expensive air flights but once you get there, it's pretty inexpensive

Have you seen ALL the National Parks? Which ones didn't you see?

WHere do you live?

Norwegian Fjord country, maybe up as far as the North Cape.
Iceland
Morocco
Turkey
Finland and the Baltics
Slovenia and Croatia
There are usually some decent package deals to Australia during the northern summer, but it's an awful long way for just two weeks, especially if you're starting on the US east coast.
And there ARE some affordable safari options - look at self-catering accommodations in the Kruger National Park "rest camps." With current exchange rates, South Africa can be a budget destination, believe it or not.

Possible revisits or supplemental trip to those you've already done -

Newfoundland
Quebec City to the Gaspe Peninsula
SE Alaska and the Yukon (Fly to Juneau, ferry to Skagway, train/bus to Whitehorse, rental car to Dawson City, back to Whitehorse, home)
Northwestern Alaska - Nome (drive out into the Seward Peninsula - gold mining, Native villages, muskoxen and bears...) and Kotzebue - dip a toe in the Arctic Ocean, midnight sun, etc.

Scandinavian countries are beautiful with charming cities... and are not as warm as other European destinations. You have been to Sweden so look at Norway and Denmark.. We would happily return to all of them.

Another consideration might be either Banff in Alberta, Canada or Tofino, British Columbia. Banff/Lake Louise/Jasper are so beautiful and full of amazing outdoor activities.

Tofino in the summer is awesome. The weather is warm, the sun doesn’t set until 10:30 at night, and the wildlife viewing is incredible. You can take water taxi to various small islands for hot springs, hiking, swimming and fishing. Learn about the many First Nations Tribes in the area to enrich the experience. Swimming, surfing, boogie boards, kayaking, easy hiking... (Obviously, This trip was a highlight for us).

Google some images and see if these places resonate.

Nicaragua (the new Costa Rica). Granada is our favorite town.

I’m there now. I’ve traveled to most of the places you have and nothing (even Provence) was more wonderful than here. I’m not a beach person either but the Adriatic is a gorgeous back drop to Old Town castles and walls. If you like history you’ll love it here. For example, lookup Split, a city from Roman times with centuries of history jumbled on top, bottom and all around!

Whoever said Turkey is spot on. Has everthjng. Take a food tour in Istanbul. Go to a hamam, a Turkish bath. I want to go back just for that, it’s heaven.

Thanks everyone!!!!!

The ideas are great - currently researching - Thailand/SE Asia or Croatia and surrounding area.

Egypt, India, Nepal & Malaysia

Sri Lanka. Easily done in 2 weeks. Variety- animals, nature, Buddhist (& other major religions) culture. Great food, beaches, history. Nice People. Cheap.