One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

"The Most Boring Road in the State."

This freshwater spring fills with 10,000 gallons of water per minute.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Egyptian Revival obelisks still rise over the old mine shafts.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

This unassuming North Austin neighborhood was built to test the novel idea of home air conditioning.

Unusual house, in an unusual neighborhood, home to some very unusual peanuts.

The biggest drug trafficking passage between Mexico and the U.S.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

Tiki luxury on Nob Hill.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A living time capsule of the 1960s Richardson Bay water-front.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

Every year, the colorful murals of Montreal get a complete makeover.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Two small markers remember the Alamo's feline protectors.

This stone windmill marks an old, mysterious homestead in what is now central Austin.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.