World's Largest

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

Gorgeous purple flowers drape from the world's largest blossoming plant.

The massive machine creates cracking displays of indoor lightning.

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

At 705 feet high, Brazil's "House of Stone" is the largest cave mouth in the world.

The saga of the massive nut begins and ends in Texas.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

One of the world's largest pianos is displayed in the workshop of the man who built it as a teenager.

All aboard the world's longest miniature railway.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The half-mile long structure is so impressive, it even shows up on satellite images.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

Quite simply the largest tree in the world (by volume).

The largest radio telescope in the world searches for extraterrestrial life from the remote limestone peaks of southern China.