Top 4 Caves ミネソタでの

崖の側面にある洞窟には、Canfield Creekに流れ込む泉があります。今日そこに行ったとき、小川には霧が立ち込めていました。とても雰囲気がありました！

このSNAには、ゲートのあるゴライアスの洞窟が含まれています。森までのトレイルの一部は刈り取られていましたが、森の中はかなり茂っていました。このエリアを完全に探索するには、長袖、ズボン、そしてより多くの虫除け対策をして戻ってくるのが良いでしょう。

ツアーには入場料がかかりますが、この洞窟には滝、小川、結婚式場、そして4億5千万年前の化石があります。UVライトツアーに参加しましたが、ツアー参加者全員にUV懐中電灯が渡され、洞窟内の通常の照明を消して自分で道を照らすセクションがあり、岩石の形成物の中で鉱物が光るのを見ることができます。

この洞窟に何が保管されていたのかはわかりませんが、明らかに人工的に作られたもので、素晴らしい石細工が施されています。そこから冷たい風がたくさん流れ出ていました。

At ground level where Minnehaha Creek meets the Mississippi River, the layer of rock you see is known as the St. Peter Sandstone. This rock formation is renowned for its "dazzling white" appearance—often likened to sugar because it is nearly 99% pure quartz—yet in the Mississippi River gorge, it often appears in vivid shades of yellow, orange, and rusty red. The vivid coloration you observe is not the inherent color of the sand but rather the effect of iron oxide (limonite) staining, which occurs through two distinct steps: Leaching: Water filters down through the overlying Platteville Limestone and Glenwood Shale, both of which contain iron-rich minerals. Oxidation: This mineral-laden water permeates the porous St. Peter Sandstone. As the dissolved iron is exposed at the cliff face or ground surface, it oxidizes (effectively "rusts"), coating the originally white quartz grains and producing the yellow and orange hues.

Now a dispensary and other businesses. Roets wanted to open here back in the day, but the ruins were not stable enough. I have seen videos online that you can still get into the brewery caves.

From the time when this was a part of the State Hospital and they would store their veggies and cheese in the cave for the winter.

The St. Croix Boom Site is a historic landmark that marks the place where logs were sorted and stored for the lumber industry from 1856 to 1914. Near the site, you can explore a cave that was once used by loggers and rivermen as a shelter and a storage place. The cave has a wooden door and a sign that reads "Boom Site Cave". Inside, you can see graffiti from past visitors and feel the cool air. The cave is a hidden gem for adventurous hikers who want to experience a bit of history and mystery.