A fitting attraction for the corn capital of the world.

Half of a waterfall goes into the river while the other half seems to disappear.

This water tower has been a staple of the Rochester skyline since 1931.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

A stunning landscape of bunkers that once stored chemical weapons.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

A Wild West jailhouse that slid down the mountainside.

Ancient pueblos built into the base of a natural canyon wall.

See massive fossils that are over 200 million years old in northeastern Arizona.

This spot along the 23.5 degree north parallel marks the northern boundary of the tropics.

These subterranean models show Mexico City's central square during three different eras.

After becoming locally extinct, this esteemed avian now flies free in the forests around the ancient ruins.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

This incredibly diverse research station is one of the largest tropical botanical gardens in the world.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

Guns that have been defending San Francisco since 1904.

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

A massive volcanic plug is now a protected area that hosts a number of bird species.

An alley covered with 20 years of bubble gum.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

Local lore holds that Butch Cassidy took an escape route through Red Canyon's sandstone hoodoos after an attempted murder.