Secret North Korean passage discovered below the world's most dangerous border.

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.

A thriving artist's wonderland located just 6 kilometers from Korea's DMZ.

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

Booksellers and public artworks fill this vibrant promenade along the disused railroad tracks.

About as hidden as can be, this specialty coffee shop is wedged between multi-story buildings at the end of a dark, skinny alleyway in Seoul.

A secret climbing tree hides along the side of a Costa Rican road.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

This abandoned sea fort has become an accidental bird sanctuary.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

The trials and tribulations of marking Poe's grave.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

This "castle" is actually a limestone and quartz formation hidden along a trail.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

An eerie, decaying ghost town destined to fade into the forest.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Where religious effigies, magic soaps, and occult candles are brought to customers at wholesale prices.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

A faux European lane smack dab in downtown L.A.

A modern day curiosity cabinet.