Taiwan is more prone to rockfalls and landslides than just about any other place on earth due to both its steep topography and the common occurrence of earthquakes and typhoons. Taroko is particularly susceptible to these disturbances. Trails such as the Swallow's Grotto and the Tunnel of Nine Turns are occasionally closed due to rockfalls, and even at other times, visitors should borrow safety helmets at one of the visitor centers before heading to those two sites. There have been quite a few people who have been injured or killed by falling rocks in the gorge, so all visitors should take the park's warning signs seriously. Also, visitors should check on trail and road conditions at the park before arriving at the park to make sure that both the park road and trails they might plan to hike are open.
Driving here is not for the timid. One hint which is probably well worth heeding:
WATCH OUT FOR THE BIG BOULDERS!!!