This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

The iconic remains of the original Academic Hall that burned down in 1892.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

Two Ming Dynasty lion statues guard the entrance to the journalism school.

The modest, restored home of the legendary ragtime musician John William "Blind" Boone.

This Mediterranean castle was built for a millionaire and his giant dog.

Built in 1869, this now-retired structure looks more like a medieval fortress than a county lock-up.

This former Union fort commands a fine view of downtown Cape Girardeau and the Mississippi River.

This 1854 courthouse along the Mississippi River has a storied history.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

Almost half-way between the Equator and North Pole.

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

Large one-man sculpture park in Michigan.

As its grandiose name implies, this wooden dome is unsurpassed in size.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A 30-foot man on a penny-farthing bicycle rides along the banks of the Mississippi.