This cave holds a surprisingly colorful variety of geological oddities.

A bypass decorated with large wooden troll carvings.

The building was originally a gas station built to resemble a Japanese tea house.

A museum devoted to the victims and the survivors of the most catastrophic fire in American history.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This shallow cave got its name from copious amount of human bones found inside.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This freshwater spring fills with 10,000 gallons of water per minute.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

World's smallest skyscraper, the product of a remarkable con.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A historic Montreal market that was the city's agricultural hub for over century.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A tribute to Ponce de Leon's supposed quest for eternal youth.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

Famously misunderstood wonder of the ancient world

The oldest working mechanical clock in the world.

The most loyal of little dogs, or a Victorian era publicity stunt?

143 feet of leaping muskie whose mouth can be used as a wedding venue.