📍Driftless Area (Southwest), Wisconsin

Descend a gentle staircase into cool, mineral-scented air where calcite crystals glint like frozen chandeliers overhead — a startling contrast to the snow outside. Kids tend to love the hollow echo of footsteps and the hushed drip of water onto ancient stone; guides often pause to point out formations shaped like bacon strips or popcorn, which delights younger visitors. Arrive right at opening and you'll likely have the narrow passages to yourselves before weekend tour groups arrive later in the day.

After lunch, ease into the snow-quiet stillness of Cox Hollow Lake, where limestone bluffs rise pale and stark above frozen shoreline and the only sound might be a pileated woodpecker somewhere in the old-growth pines. Stick to the flatter trail sections near the picnic areas — plenty of bench stops for little legs, and the open sightlines mean toddlers can wander safely nearby. This is a short, restorative outdoor stretch, not a full hike, timed to end well before nap window.

Return to the park in the day's early light, when the snow is often untouched and the eastern picnic area catches soft morning sun over the lake. Arrive by 9am and the trails feel entirely yours — no crowds, just the crunch of boots on packed snow and maybe a deer picking its way along the tree line. Keep to the shorter, flatter loops near Cox Hollow; with young kids, this is about noticing details — icicles on the limestone, animal tracks, the particular blue-white color of shadowed snow — rather than covering distance.

If yesterday's visit left anyone wanting more, a shorter return trip works well as a warm-up stop before nap time — the cave's constant temperature is a welcome relief after a cold morning outside, and a second, slower look at the underground lake's reflection often reveals details missed the first time. Skip this if the family's had enough cave time; the park alone can easily fill the morning.