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Even among Hawaii's many wonders, this national park stands out. Its two active volcanoes testify to the ongoing birth of the islands: quiet Mauna Loa (13,677ft) sprawling above, its unassuming mass downplaying its height, and young Kilauea (4091ft), one of the world's most active volcanoes, providing near-continual sources of awe. With luck, you'll witness the primal power of molten earth boiling into the sea. But the park contains much more: overwhelming lava deserts, steaming craters, lava tubes and ancient rainforests.
For hikers, the possibilities are endless.