The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Palace where the nearly un-killable Rasputin was murdered.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This Central New York ghost town was once a prosperous railroad community.

Whimsical artist house in the New Jersey woods.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

One of the world's largest model railroads is a mind-boggling achievement.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The U.S. military dumped millions dollars worth of goods off a beach in Vanuatu, purely to spite the British and French.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Seven people are buried in the middle of what's now a movie theater parking lot.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Ancient snack bar of the Roman Empire re-opened.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.