Name: Secret Underground
Genre: Comedy
Duration: 25 min

Watch over 2 000 of HISTORY’s most fascinating documentaries and series  anytime  commercial-free.

HISTORY VAULT

Rice is the world's most versatile grain; there are over 140,000 types - white, brown, long-grain, wild, short-grain, jasmine, Arborio, Basmati, black Thai, sweet, sticky - enough to satisfy any discerning palette.

Modern Marvels

Rice

The top destination for all things history.

HISTORYCHANNEL

Get behind the wheel and take control of the some of the largest, fastest, most powerful machines on the planet; these aren't the average vehicles and handling one of these rides is unlike anything else.

Driver's Seat

Celebrate the ingenuity and imagination found in the world around us. 24/7 episodes of Modern Marvels, television's most innovative series.

The world's biggest and oldest flag manufacturer; inside the last US athletic shoe factory; the strangest form of alternate transportation; a hot toy company that believes it's imperative to keep their work here at home.

Made in the USA

A look under the feet of Americans, from secret military installations and experimental farms to tunnel networks and neutron lasers.

Secret Underground

Amazing, ingenious and ultrasturdy shelters, machines, containers, and materials help to ensure the continuation of society.

Built to Last

Dogs are fearless, faithful, determined, and swift, serving as hunters, soldiers, rescuers, and protectors; they are perfectly engineered marvels, combining natural instincts with complex training.

Dogs

History - fascinating and exclusive programs on subjects ranging from American and world history to explorations of major events in politics, entertainment and social history.

History

From a massive oil spill to refinery blaze to a downed plane, find out what went wrong and how to prevent the next engineering disaster.

Engineering Disasters 22

The historic one-armed bandits; cutting edge, computerized slot machines; some of the wackiest vending machines; binoculars at popular tourist sites; a unique company that collects and cleans the coins thrown into fountains.

Coin Operated II

The biggest stacked burger in the world at almost 250 pounds; a plus-sized Sicilian pizza that feeds almost 75 people; a 72-ounce steak that no real cowboy can resist; the seven-pound hot dog that's too big for a bun; a giant cupcake.

Supersized Food

Mega stores are giant facilities engineered to keep up with America's supersized habits; they are the largest, busiest places in the country; their greatest challenge: keeping up with demand on a massive scale.

Mega Stores

It's impossible to live without them, and yet they didn't even exist a couple of decades ago; episode counts down a list of the top ten technological innovations of the last generation.

Top Ten

Visiting the U.S. Library of Congress to explore the contents of secret vaults and see how the staff of 4,000 catalogs and preserves treasures.

The Real National Treasure

Watch TV Networks, Shows and Movies | DIRECTV

The latest movies and must watch shows!

Watch The Pitt exclusively on the HBO Max app, included with an HBO Max subscription.

Data/messaging rates may apply for app download/usage. HBO Max subscription required.

Welcome to your ultimate entertainment destination. Watch new episodes of School Spirits and more all in one network.

Watch exclusive originals like heartfelt comedy American Classic, Hollywood hit movies & more.

MGM+ is a trademark of Metro-Goldwyn-Mayer Lion Corp. All copyrights, trademarks, and other intellectual property or proprietary rights are the property of their respective owners.

Watch visionary original series like Outlander, Outlander: Blood of My Blood, Spartacus: House of Ashur, Power Book, BMF and much more.

Stories of those who believed in dreams and defied the commonplace with their extraordinary creations; covering some of the world's architectural and engineering structures, scientific inventions, and social wonders.

S15 E30 | Secret Underground