One of the last remaining buildings from one of Calgary's earliest businesses.

During its heyday, 72 one-ton buckets from this dredge bore into the Powder River excavating vast gold deposits.

This 80.33 troy ounces of solid gold is believed to be the largest nugget from Oregon still in its original form.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

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

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

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

This riverside restaurant has been serving customers since 1146.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This German bone house contains the remains of some 20,000 souls.

Fantastic views and thousands of love locks.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Walk 2,300 feet above the ground on the "Troll's Tongue."

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.