The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This luxury shopping lane has been protected by its own tiny police force for over a century.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

Only through the lens of a microscope can visitors see the true treasures inside this museum.

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

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Gutted airplanes slowly decay in a Florida field.

It's a pretty creepy lock-up.

This curio museum seems like the type of place you might find a mogwai or a monkey's paw.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

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

Intertwined, interspecies trees which locals believe can grant boons to lovers.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

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

This private residence was the template for one of the most beloved television homes of all time.

This former prison is an Art Deco masterpiece with a past full of civil rights flashpoints.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.

This creative sculpture was a way to "recycle" an old tree.

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

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

How Quincy, Florida became the richest town per capita due to one man's shrewd business acumen and taste for fizzy drinks.

Electrical pylon in the shape of Disney's beloved mouse.

A local landmark with generations of spraypainted messages, and more being added each day.