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There's always a dilemma about traveling to an endangered destination. Whether it's the threat of global climate change, commercial enterprise or sightseer wear and tear, your conscience might stop you from buying your ticket. But for those who decide to fulfill their dream of experiencing a natural wonder like the Antarctic or the remnants of an ancient civilization like Angkor Wat, there are ways to ensure a visit will inject some much-needed cash into the local economy, as well as being low-impact.
Here is our selection of the world's most endangered places, along with eco-friendly tour companies and locally owned accommodations dedicated to the preservation of these threatened world treasures.