Different Kinds of Holes

(Hole-in-the-Ground, OR: Crater Lake for the aqua-phobic)

With the release of the entrancing new picture Sanctum 3D, many moviegoers are beginning to wonder about the mysterious world beneath their feet. In an increasingly interconnected society, opportunities to glance upon the unknown are becoming more and more scarce. For this reason, we have James Cameron.

Still, there are times when we tire of James Cameron and tall blue people who live in trees. When this happens, we seemingly have no choice but to go out into the world and experience something new first-hand, like how we used to do it before we had Google Streetview.

If you're vexed on how exactly reality works, here are a few adventurous subterranean spaces one might explore:

1. Hole-in-the-Ground, OR - A stunningly intact maar, Hole-in-the-Ground is just that--a hole in the ground. For those not up on the latest craterology lingo, a maar is a volcanic creater caused by a phreatomagmatic eruption. That is, water comes in contact with super hot lava or magma and explodes, sometimes leaving a tremendously exciting hole in the ground.
2. Manhole - Entire worlds are hidden underneath many an anonymous manhole cover. The sewer, for example, is a tremendously exciting world of wonder and, even better, tremendously accessible! Just duck down a manhole and unlock an entire universe previously unknown to the common passerby. Be careful, however! While manholes may look fun, they are meant for men. If they were meant for women, they'd be call genderneutralholes. Therefore, if you're a woman, find another hole.
3. Subway - A subway is like a manhole, except its bigger and it costs money to get into. Also, there are women. The subway isn't all that great.
4. Pothole - These little wonders spring up in the street and make people angry. Nothing is more frustrating, it would seem, then driving over a five-inch hole in the street with a 2.5 ton car. While a pothole doesn't offer much to explore, some might be big enough for you to stick your head inside. In certain cases, it may be possible to enlarge a pothole to allow for both head and neck. Remember, potholes are funholes!

There are many fantastic underground spaces beyond what is listed above! Be sure to explore and find a few of your own.