This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

Pompeii's less famous neighbor is still revealing her secrets.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A dilapidated dock tells the story of Titanic's missed arrival.

What remains of the summer palace of King Kamehameha III.

A unique set of caves that spits waves back out into the ocean.

This WWII plane died a quiet death, and is now a garden eel playground.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A chilling monument to Korean patriots who resisted the Japanese occupation.

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

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

Landmark Chicago building narrowly avoided destruction.

Once an ornate movie theater remade by Catholic Charities.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

This historic-shipwreck-cum-diving-spot can still be seen poking its boiler out of the Lake Michigan waters that claimed it.

This shop for all your super spy needs hides an educational secret.

A 120-year oil leak slowly unleashes more gallons of oil than the Exxon/Mobil disaster.

Where the legendary Orson Welles got his theatrical start before "Citizen Kane."

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.