This enormous World War II relic is one of the largest wooden structures in the world.

A vast array of tropical plants collected by a vacationing couple.

A towering, steel behemoth that has graced the skyline of Lakeland, Florida since the early 1980s.

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A haunted hill that supposedly defied gravity.

The world's 2nd or 3rd or 4th busiest seaplane base.

The world's largest private aircraft collection.

The first declared National Monument in the United States.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

One of the ghostly stops along Route 66.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Abandoned anti-ballistic missile base.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

Abandoned Air Force base that has fallen into disrepair.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The overgrown ruins of a once thriving World War I-era copper mine.

Remains of a Greek freighter trapped off of Rocky Point in 1961.

A "haunted" landmark on the coast of Southern California.

The 10-foot-wide Long Beach home was built on a dare.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

Megachurch turned Catholic church comprised of 10,000 glass panes.