If land art claims to originally be an environmental art form advocating a return to nature, it also comes with a form of renunciation and abandonment of certain art-based beliefs, challenging traditional art exhibition and production spaces in particular. Expressing strong ideas, the artists who embody this movement are also full of contradictions, often sending mixed messages. Despite their initial claims, they have had to deal with an omnipresent art market, which means submitting to the rules they denounce. This dissertation compares several major themes of land art, in which contradictory ideas collide.