Liberty cap

Chiefly it refers to:

liberty cap, a brimless felt cap, such as the Phrygian cap or pileus, emblematic of a slave's manumission in the Ancient World.

The phrase may also refer to:

Liberty Cap, a celebrated granite dome in Yosemite National Park
Liberty Cap, an unusual hot spring in Yellowstone National Park
Liberty Cap, a prominent peak on Mount Rainier
The liberty cap (Psilocybe semilanceata), a psychedelic mushroom
The Liberty Cap Large Cent

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