these wonders remind us of the planet's beauty and fragility. In celebration of Earth Day, let's explore 50 of the most ...

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Jeju Island boasts South Korea's highest mountain, Hallasan, a dormant volcano that towers nearly 6,400 feet above sea level.

The notion of the Seven Wonders of the Ancient World can be traced back to the fifth century B.C. These creations rivaled many created by nature in their size, majesty, and beauty. Six of the ...