The Grand Canyon of Texas.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This replica of the Greek structure is in the heart of Nashville.

Of course the guy with the first patent for an ice machine lived in Florida.

Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

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

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

This now-deactivated naval base defended the Florida coast for centuries.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A circus legend leaves an unexpected endowment.

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

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

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

Legends surround this jagged rock formation in the New Mexico desert.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

See massive fossils that are over 200 million years old in northeastern Arizona.