This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

This old-fashioned carhop restaurant gave the world the waffle cone.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.