What are the best day trips from Santiago?

Valparaíso over Viña del Mar for a day together. Valpo sits 120 km northwest, about 1 hour 40 minutes by Turbus from Terminal Alameda in Santiago (CLP 5,000 one way, departures every 15 minutes from 6am). The 42 cerros connected by funicular elevators give you a built-in split-interest day. One of you rides Ascensor Concepción (CLP 300, built 1883, the oldest still running) up to Paseo Gervasoni and Neruda's La Sebastiana museum at Ferrari 692. The other follows the Cerro Alegre and Cerro Concepción street-art circuit, where murals by Inti and Charquipunk stretch across four-story facades in sun-faded turquoise and deep crimson. Meet for lunch at J Cruz M on Condell 1466, where a chorrillana of fries, sautéed onions, sliced beef, and fried eggs feeds two for CLP 9,000. You'll smell the kitchen's grease and salt from the sidewalk on Condell. That said, Barrio Puerto feels rough after dark. Catch the 7pm Turbus back.

Cajón del Maipo handles the 'one wants adventure, one wants quiet' split within 50 km of Santiago. The canyon starts at San José de Maipo, reachable by bus from near Metro Bellavista de la Florida (CLP 1,500, about 75 minutes). The adventurous partner rafts Class III rapids on the Río Maipo with Cascada de las Ánimas for around CLP 35,000. The other soaks in the Baños Morales hot springs further up the valley, where the water holds near 30°C even in winter. You meet afterward for an asado at a roadside parrilla in San Alfonso, still smelling faintly of sulfur. CLP 8,000 gets you lamb charred at the edges and pink in the middle, with the sound of the Río Maipo behind your table. Mind you, the road past San José narrows to one lane in places, and winter rains close the upper valley from June through August. Check conditions with the Municipalidad de San José before heading up.

The Casablanca Valley, 80 km west on Ruta 68, works better for wine-loving couples than the closer Maipo Valley wineries around Pirque. Casablanca's coastal fog produces some of Chile's strongest Sauvignon Blanc and Pinot Noir in a quieter setting. Emiliana Orgánico charges CLP 12,000 for a 4-wine tasting, and Kingston Family Vineyards sits 3 km further along the valley road. No public bus reaches either winery, so budget for a rental car or a guided tour from Santiago (CLP 60,000 to CLP 80,000 per couple for the day). If one of you cares more about poetry than Pinot, Isla Negra and Pablo Neruda's seaside house lie 30 km past Casablanca on the coast. The Isla Negra museum (CLP 8,000) holds Neruda's collection of ships in bottles and carved mastheads. The ground-floor rooms carry the smell of salt-damp wood and old lacquer from the Pacific air pushing through the windows. You can combine Casablanca tastings with Isla Negra if you leave Santiago by 9am and limit yourself to two wineries.

Pomaire, 65 km southwest toward Melipilla, is the shortest trip on this list and the right call when one of you is fading by mid-afternoon. The village has one main street lined with ceramics workshops. The whole loop takes about 2 hours. You go for the pastel de choclo at La Greda, where ground corn baked over slow-cooked pino (beef, onion, olives, boiled egg) arrives in a clay pot too hot to hold. La Greda's wood-fired oven gives the corn a sweet, smoky edge you notice two tables away. CLP 6,000 per portion, and it leaves no room for dessert. Hand-thrown clay pots from the workshops run CLP 2,000 to CLP 8,000 and pack flat in checked luggage. Buses Melipilla departs Terminal San Borja roughly every 30 minutes (CLP 2,500, about 60 minutes on the road). You'll likely be back in Santiago by 2pm, which leaves Barrio Lastarria or Barrio Italia free for an early dinner without the end-of-day crash that longer excursions tend to cause.