// Southwest · 7–10 days
Texas & New Mexico Borderlands
Rio Grande canyons, fossil reefs, gypsum dunes, and underground cathedrals.
/ the route
- Stop 01Big BendTexas · 3 days · best october–april
Where the Rio Grande carves the Chihuahuan Desert beneath the Chisos.
Santa Elena CanyonWindow TrailRio Grande hot springs 
Stop 02Guadalupe MountainsTexas · 1 day · best fall & springA fossil reef rises from the West Texas desert to Texas's highest summit.
Guadalupe PeakMcKittrick CanyonEl Capitan
Stop 03Carlsbad CavernsNew Mexico · 1 day · best year-roundAn underworld of cathedral-sized chambers and twilight bat flights.
Big RoomNatural EntranceBat flight program
Stop 04White SandsNew Mexico · 1 day · best fall & springThe world's largest gypsum dunefield, blinding white against the Tularosa Basin.
Alkali Flat TrailDunes DriveSunset stroll
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- Andes & Amazon12–16 days · 3 parks
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- Appalachian Heritage6–9 days · 4 parks
Blue-misted ridges, deep caves, and the wildest gorge in the East.