One of the Oregon Cave’s imaginatively named formations is Angel Falls, a calcite flow located in the Ghost Room in Oregon Caves National Monument. When you reach it, you see it glowing in the dark under black lights which makes its fulvic acid-covered lengths of white rock shine an eerie blue (apologies on the photo — my camera did not focus well with the black light — it looked a whole lot better than the photo indicates)
You will then also get a chance to see Angel Falls bright white lengths in regular lighting:
The next stop on the Oregon Caves tour is at the Exit Tunnel.