In physics, a flow of liquids and or gases around a central axis is a vortex. In meteorology, such as weather this can be observed in tropical storms, hurricanes, typhoons which flow around the eye of the storm which serves as the axis. A more powerful and concentrated version would be a tornado or even a dust devil. The flow of water down a drain or when you flush your commode is a simple vortex of sorts.
Delving outside of basic physics and into geophysics, there are geomagnetic anomalies which can also be considered a vortex. Geophysical vortexes [vortices] are a highly localized variation in the Earth's magnetic field. Delving deeper into theoretical science, other forms of a vortex include Black Holes of course but more interestingly the time space vortex. On the Earths surface there may also be highly localized space time vortexes. Space Time vortices or even quantum vortices would be highly localized variations in the Earth's magnetic or space time field.
Vortex Locations - Gravity Vortexes, space time vortex, Gravity Hills and mystery spots are located across the USA and Canada.
Lordsburg Gate - There's some strange goings on in the dessert outside of Lordsburg, New Mexico. Somewhere along US Highway 90 between Lordsburg and Silver City, NM there is a vortex known as the Lordsburg door and sometimes the Lordsburg gate. The vortex allegedly opens up from time to time and allows a glimpse into another dimension.
Lake George Mystery Spot - Stand in the Lake George Vortex and witness a phenomena that defies the laws of acoustical physics and scientific explanation. Stand in the exact spot and holler, at the cosshairs you will hear your voice echo back with a tinny resonance unlike any other echoes.
Gulf of Aden Vortex - One bizarre document Wikileaks published regarded a report delivered to Russian President Vladimir Putin by an Admiral Nikolai Maksimov, commander of the Russian Northern Fleet. The report alleges that an 'electromagnetic vortex' has opened up near the Somali Coast in the Gulf of Aden. As per Admiral Maksimovs report this 'mysterious magnetic vortex' has defied all the combined efforts of Russia, U.S. and China.
Eye of the Sahara - The eye of the Sahara also known as the Richat Structure or Guelb er Richat, is a highly unusual and some might venture to say - bizarre circular formation in the Sahara desert. This structures origins are uncertain, but it dates far into uncharted antiquity.