First, the one mentioned in the parent:<p><pre><code>  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=26033
</code></pre>
And a couple skimmed off the all-time best[1]:<p><pre><code>  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=31722 (Nitrous Oxide)
  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=17787 (Mushrooms)
  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=104336 (Ibogaine)
  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=96838 (Methoxetamine)
  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=68367 (Sensory Deprivation)
</code></pre>
Obligatory honorary mention:<p><pre><code>  https:&#x2F;&#x2F;www.erowid.org&#x2F;experiences&#x2F;exp.php?ID=68111
</code></pre>
[1] - It occurred to me that I selected predominantly positive, or at least &#x27;wonderous&#x27;, reports. Dig around and you&#x27;ll find some that are less so.