Though illegal, city officials have made an exception for this work of art.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

This subterranean funicular is one of the world's smallest subways.

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This impeccably preserved farmstead is a time capsule of a Pulitzer Prize-winning novelist's life.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

A lion given to the prime minister somehow got stuffed and sent to Florida.

Former wax museum from the 1960s, home to many wax U.S. Presidents and the famous White House miniature.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

Flip your own pancakes in this old sugar mill within a Florida state park.

The only ancient owl carving found east of the Mississippi.

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

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