Manoa Falls, O’ahu.This short hike will take you to the 100 foot Manoa Waterfall. The trail can be quite muddy, so make sure to wear proper shoes (you will be sorry if you wear flip flops). The 0.8 mile trail gradually ascends through a lush rainforest ending at a viewing area set back from the base of the falls. Be warned you will get hot and sweaty but it’s totally worth it. Fun Fact: Several scenes from the TV show LOST were filmed here, as were parts of Jurassic Park.