What is this thing I found in a small stream? It's about 13cm in length, has evenly spaced holes all the way round covering the upper half of the tube. One side seems to be sealed, the other is open. Hard to say whether it's hollow inside as a lot of sediment has built up
A Cool Guides Real proportions of all land masses revealing actual areas of countries, territories and major islands without any distortions (by Art.Lebedev)