A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

One-layer pyramid in Indiana.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

A river with some unusual, and occasionally dangerous, habits.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The Rio Lerma (Chignahuapan) in El Salto, Mexico, is one of the most polluted rivers in the world. It’s covered in white foam, and falling in can kill.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

A dark tunnel leads to a striking white crater that seems to be from another planet.

The enigmatic and seldom visited ruins of a Mayan city-state.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.