您说得没错，只看到皮划艇，不过运河那边倒是有那种“水上漂“。我觉得跟冲浪板差不多。

又从NPS那里的Frequently Asked Questions里看到有趣的问答：

What is the largest/smallest national park site?
Largest - Wrangell-St. Elias National Park and Preserve, AK - 13.2 million acres
Smallest - Thaddeus Kosciuszko National Memorial, PA - 0.02 acres

估计后者一定不在DeepCreek兄的List里面。