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

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

The world's largest military aircraft cemetery.

America's only nuclear missile silo open to the public.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Limestone caves with spectacular showcase chambers.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Abandoned railway line circling the city of Paris.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.