The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

One of the largest underground systems runs under Canada's largest urban center.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

These strikingly barren, rolling red hills were caused by bad farming practices.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

Soaring over the Niagara Whirlpool since 1916.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This futuristic German television spire is actually the world's largest digital clock.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The history and future of cannabis.

Ever-growing collection of devils in art.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

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

The modern birthplace of Irish freedom.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

This derelict superstructure was a very important warning system for the Soviet military.

This attraction was abandoned after the Chornobyl disaster.