You were once able to challenge a chicken to tic-tac-toe at this park, which is now converted into the Aikman Wildlife Adventure.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

A museum dedicated to man's boldest venture.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

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

The seventh largest spring in the world.

Life-size figures portray depot attendants, train crew, and passengers frozen in time at the oldest railroad station in Arkansas.

Less a museum than a bizarre fantasy world created by artists and engineers.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

Often referred to as the largest spring in America.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

Two gushing waterfalls of hot spring water within a block of each other.

Symbolic attempt to overcome the issues of life.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

A home designed to be on the cutting edge of comfortable, low-cost living.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

This Arkansas town is known for its gangster history, its healing waters, and now its brews.

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This former mining town was named the most toxic town in America.