For day trippers based out of Flagstaff, AZ, winter is a great time to visit Grand Canyon National Park's South rim. There's plenty of parking, visitor services are open, Hermit Road is open to private vehicles, and there's still great shuttle service for those wanting to hike at least part of South Kaibab Trail.
Valley of Fire State Park is an excellent (and very manageable) day trip out of Las Vegas. Highlights include red sandstone formations, a scenic drive, a few short hiking trails, petroglyphs, and desert flora and fauna. Be sure to pack a picnic lunch, sunscreen and plenty of water!
As first-time visitors to Death Valley National Park, we seriously underestimated the scale of America's hottest, driest and lowest national park. A day-trip to the largest national park in the lower-48 is barely enough time to get a sense for the dramatic and varied landscape and definitely not enough time to get out to do much exploring on foot. If we ever make a return visit to Death Valley NP, we'll plan for an overnight stay in the park, for more boots on the ground hiking time plus opportunities for sunrise and night photography.
Our 2019 adventure exploring Newfoundland and Labrador aboard the RCGS Resolute was a win-win-win. For one thing, we visited a new-to-us part of Canada, including many stops well off the beaten path. We made new friends. And our experience confirmed that expedition cruising is a pretty good fit with our travel preferences.
What a spot for the last Zodiac excursion on One Ocean's Labrador and Torngat Mountains expedition cruise: the Button Islands are located near an upwelling of ocean currents laden with nutrients, which make these barren, low islands the Arctic equivalent of an African watering hole. A frigid Zodiac safari in the Button Islands is likely to encounter sea birds, marine mammals and polar bears.