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

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

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

Location of a reliquary containing bone fragments of 18 saints.

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.

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

One of only two pod-shaped homes designed by Frank Lloyd Wright.

View rare birds and interact with lemurs at this nonprofit run entirely by volunteers.

The first KFC is on the National Register of Historic Places.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

A late-night restaurant empire was launched from this humble storefront.

This metal disk commemorates the birth of a historic American holiday.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

Jule Körner's house full of bizarre architectural details.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

A museum dedicated to an incredible woman who founded a pioneering school for rural Black students.

This North Carolina store preserves a historic moment in America's movement for racial equality.

Where three rails and three centuries of transportation meet.

A fake 1930s-euro-style hotel with an indoor mini golf course.

Amphibious mascots display a quirkier side to this luxury hotel's rich history.

The former home of the man whose radical ideas changed the nation.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.