Never attempt to swim under a waterfall.

The water falling from above is known as a "super critical flow". The water below is known as "subcritical flow". As the water falls, it pushes the water below it to the edge of the river, which bounces off the riverbed and back up, ad infinitum.

More Outdoor Tips

9 Expert Tips for Removing Snow and Ice

9 Expert Tips for Removing Snow and Ice

9 Expert Tips for Removing Snow and Ice
Camping Pro Tips For First-Time Campers

Pro Tips for First-Time Campers

Camping Pro Tips For First-Time Campers
Prevent yourself from slipping in the snow by putting your socks over your shoes.

Prevent yourself from slipping in the snow by putting your socks over your shoes.

Prevent yourself from slipping in the snow by putting your socks over your shoes.
Keep matches dry by dipping the tips in wax and scraping it off as you need them.

Keep matches dry by dipping the tips in wax and scraping it off as you need them.

Keep matches dry by dipping the tips in wax and scraping it off as you need them.
When camping, measure and package all ingredients for each meal in advance.

When camping, measure and package all ingredients for each meal in advance.

When camping, measure and package all ingredients for each meal in advance.
When hiking in an area with a high tick prevalence, wear light colored clothing.

When hiking in an area with a high tick prevalence, wear light colored clothing.

When hiking in an area with a high tick prevalence, wear light colored clothing.
Bring dryer lint to use as a fire-starter.

Bring dryer lint to use as a fire-starter.

Bring dryer lint to use as a fire-starter.
Use trick candles to help start a campfire.

Use trick candles to help start a campfire.

Use trick candles to help start a campfire.
Bring cornstarch to the beach to get wet sand off your feet.

Bring cornstarch to the beach to get wet sand off your feet.

Bring cornstarch to the beach to get wet sand off your feet.
If you're going hiking, download and print (or buy) a topographical map of the area.

If you're going hiking, download and print (or buy) a topographical map of the area.

If you're going hiking, download and print (or buy) a topographical map of the area.
Learn and how to use a firearm.

Learn and how to use a firearm.

Learn and how to use a firearm.
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