The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

A dazzling display of lights and crystals.

This small plaza encourages people diagnosed with cancer to never give up hope.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

A castle-inspired apartment building that has stood in Birmingham since 1927.

This fountain was commissioned by a mother grieving over her son's passing.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

Every last book in this bookstore is signed by the author.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

Perhaps the most spectacular grotto along the Algarve coastline.

This small chapel is built of human bones and decorated with a golden skeleton.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This giant sculpture made of trash is a critique of society's wastefulness.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.