水裡的大洞

morning-glory-hole-in-the-water

morning-glory-plughole-spillway

plug-hole-giant-drain-in-water

vortex-in-the-water-monticello-dam

其實是叫Bell-mouth spillways的洩洪道:

bell-mouth-spillway

bell-mouth-spillway1

big-hole-in-the-water

giant-dam-spillway-ladybower-resevoir

giant-plughole-monticello-dam

glory-hole-in-water-ladybower-dam

glory-hole-spillway

hole-in-the-water-ladybower

ladybower-plughole

large-bell-mouth-spillway-monticello-dam

large-hole-in-the-water

massive-hole-in-the-water

monticello-dam-aerial

monticello-damn-giant-spillway

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