This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

A park where people have been going to feed friendly pigeons since the 18th century

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

The world's brightest bioluminescent bay.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

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.

It's a pretty creepy lock-up.

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

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

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A statue honoring 44 continuous years of greeting passing ships.

"X" marks the spot of an echo chamber in the middle of a plaza.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

A modest walled graveyard where nobody is actually buried.

Georgia's first brewery is also one of its oldest surviving buildings.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.