land adventure - trekking, hiking, horseback riding
outside: outside a building; 'in summer we play outside' where the air is unconfined; 'he wanted to get outdoors a little'; 'the concert was held in the open air'; 'camping in the open'
Wilderness is generally defined as a natural environment on Earth that has not been modified by human activity. Ecologists consider wilderness areas to be an integral part of the planet's self-sustaining natural ecosystem (the biosphere).
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