Los Azufres Spa Natural - Hot Springs in Mexico


If there were a ranking of the world's stinkiest hot springs, this one would definitely be at the top of the list.

I sank my body into the eerily bubbling green swamp.

Geothermal power plants

Among Mexico's geothermal resources, which are the fifth largest in the world, Los Azufres, located 150 miles west of the capital Mexico City, is an area of particularly high geothermal energy.

Geothermal Power Station

Plants that emitted steam with a rumbling sound were scattered throughout the forest.

Stinking swamp

Where there are geothermal resources, there are naturally hot springs.


Los Azufres Spa Natural is the most popular spa accommodation in the region.

As seen on the sign at the entrance, a model enjoying mud packs in a luxurious atmosphere was featured, and the desire to market along those lines was understood.


Upon entering the site after paying a fee of only 60 Mexican pesos, a strong sulfur smell wafted through the air.

A mass of rocks was spewing white smoke and volcanic gases, which seemed to be the main source of the odor.


Going further in, there were two green swamps, one large and one small, with the center part of the swamps blocked off.


Later, I would soak in these swamps.

There were campsites and cabins in the trees at the far end.


The cabins remained clean and new.

There was a small restaurant attached; and you could spend all day on the property if you wanted to.


There was a series of etiquette for soaking, and I was given a lecture by a staff at the beginning.

First, I changed into swimsuits in separate men's and women's changing rooms and stored the luggage in the car.

Changing Room

Next, I went into the larger swamp called Baño de lodo termal (mud bath) for 10 minutes.

The water was tepid, about 86 degrees F.

Baño de lodo termal1

By the way, when I circled the two swamps, I found that although there were places where stream water was flowing in, it was not clearly flowing out of them.

I surmised from this that hot steam was gushing out of the bottom of the swamps and heating the water.

Baño de lodo termal3

The swamp water, concentrated by the dissolution of hot spring elements, had a strange thickening.

Is it hygienic?
He who believes will be saved.

Most of the mud baths were roped off and swimming was prohibited.

Baño de lodo termal2

Intense bubbling was seen in the area.

There was a thick layer of mud at the bottom of the swamp. 

Mud Bath1

You scoop it up yourself or use pre-stored mud and apply it to your body.

This is said to have skin beautifying effects, but it smells terrible.

Mud Bath2

Even with all the knowledge and experience I had, I could only recognize the smell as that of a ditch.

I felt it was mixed with the smell of decomposition.

Other customers were also stinking and smeared it all over their bodies.

Mud Bath2

Swamp from Temazcal

Next, I holed up in a Temazcal (steam bath) covered in mud for 15 minutes.

Temazcal Natural1

The primitive atmosphere of the hut was it.

It was filled with natural steam, which warmed me from the core.

Temazcal Natural2

Finally, I soaked in the smaller one called Baño de agua termal.

Temperatures ranged from 95 to 113 degrees F and varied widely from place to place.

Soaking 01

Volcanic gases were erupting wildly from the bottom, and the surface of the water was rippling.

If you accidentally put your foot on the vent, it was so hot that you would jump up.

But still, was this stench really okay?

I took a careful shower on my way home, but the odor seeped into my body.


Los Azufres Spa Natural, Los Azufres, Michoacán, Mexico

My rating

Type: Walk-in, Lodging

Rule: Clothing required

Chlorination: No

Water temp: Up to 113 degrees F

Official website

  • Writer

Hot Springer Ken

A hot spring enthusiast based in Japan. Toured over 300 North American hot springs while working in Texas from 2016 to 2022. For updates, visit X or Instagram!

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