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