Welcome back. Some national parks ask you to look at scenery that has sat still for millions of years.

Parque Nacional Los Glaciares does not play that game. The ice here is active, and you can hear it.

The ice that keeps moving

This park sits in Santa Cruz province, in Argentine Patagonia, and covers roughly 2,800 square miles. It's the third-largest national park in the country. The headline act is the Southern Patagonian Ice Field, the largest ice mass outside Antarctica and Greenland, and it feeds dozens of glaciers that end in lakes. Perito Moreno is the one everybody comes for. It's 97 square miles of ice and about 200 feet tall where it meets Lago Argentino, and it advances a couple of meters a day. You'll hear a snap, then a chunk the size of a car drops into the water. That sound is the whole reason to come.

What to see beyond the famous wall

Perito Moreno gets the crowds, but don't skip the boat crossing to the opposite shore for the walking trails, where the boardwalks put you close enough to feel the cold spray. Upsala is the other big one, reached by catamaran from Punta Bandera, and it's a mess of floating icebergs rather than a single clean face. Further north, the Viedma glacier sits under Mount Fitz Roy territory. If you're fit, the day hike to Laguna de los Tres in El Chalten gives you Fitz Roy's granite spires reflected in a green lake, and that view competes with any ice.

Getting there and around

Fly into El Calafate, the gateway town, from Buenos Aires or Ushuaia. From the airport it's about 50 miles to the park's main entrance. Buses run from El Calafate to Perito Moreno daily, and a round trip costs roughly $40 to $60 USD. For El Chalten and Fitz Roy, there's a separate 3-hour bus from El Calafate, around $30 USD each way. Once inside, the Perito Moreno boardwalk system is free to walk, but the boat crossings and guided ice treks cost extra. The classic minitrekking tour on the glacier runs about $150 USD and includes crampons and a guide.

Costs and timing

Park entry is around $30 USD for foreign visitors, payable at the gate, and it covers multiple days if you keep your ticket. Book the Perito Moreno bus and any glacier trek a few days ahead in high season, since the minitrekking spots sell out. Go between November and March for long daylight and milder temperatures, but expect wind that can hit 60 mph. The shoulder months of October and April mean fewer people and cheaper lodging, with the tradeoff of shorter days and some closed trails.

Before you go

Pack layers, a waterproof shell, and sunglasses, because the glare off the ice is real. Bring cash in pesos for park fees and small vendors, since card readers in the park are unreliable. And keep your distance from the glacier edge, the ice calves without warning. The boardwalks exist for a reason.

Parque Nacional Los Glaciares rewards you for showing up with patience and a warm jacket. Stand at the Perito Moreno viewpoint long enough and you'll catch the ice moving, one snap at a time. Go see it while it's still there.