Season 2

From a bat swung by one of baseball's boldest pioneers, to an iconic painting hidden behind a false wall, these astonishing finds prove that America's greatest treasures can turn up in the most unlikely places.

From WWII bombs pulled from the sea and Nazi bunkers buried in sand, to chemical weapons hidden beneath Washington, D.C., these explosive discoveries prove that history's blasts from the past can still shake our world today.

Some secrets refuse to stay buried. Whether it's illicit cargo in a frozen lake, a stolen masterpiece worth millions, or a brothel hidden in the shadow of the Capitol—the truth always resurfaces.

From a legendary city swallowed by the jungle, to an underground metropolis stretching 18 levels deep, and even a forgotten pyramid from a lost civilization, sometimes the biggest mysteries on Earth are closer than we think.

A forgotten manuscript in a dusty trunk. A priceless painting discovered in plain sight. A royal tomb hidden for millennia beneath the sands. These famous finds prove history's greatest treasures often resurface when least expected.

Forget the monsters under your bed. The real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

Secrets of popes, rewritten laws, and cities lost to the waves — these divine discoveries shake our beliefs and uncover mysteries of truly epic proportions.

From a long-lost keepsake tied to the world's most famous astronaut, to a giant flying reptile that once ruled the skies, and even a previously unknown planet orbiting two suns…some extraordinary discoveries remind us to keep looking up.

The world's greatest fortunes often surface in the most unlikely places. From a Fabergé egg found at a humble flea market, to rare baseball cards hidden inside an old piano.

Beneath the earth, frozen in the tundra, and hidden in the depths of the sea, lie some of the deadliest discoveries of all time.