An important landmark in the history of algebraic logic.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

An ancient iron pillar in Delhi that seems to be rustproof.

This quirky countryside store is known for the goats that hang out and eat the grass on its roof.

The Origin of On the Origin of Species.

The oldest public library in Ireland.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The first declared National Monument in the United States.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Fossils, railroads, and waterfalls!

The only road through the heart of Glacier National Park.

Historic site where Native American hunters once trapped and killed buffalo.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

Quite simply the largest tree in the world (by volume).