Over 60 chemical plants and oil refineries sit in a 15-mile-wide section outside town.

This controversial monument was designed to lionize the Red Army, but also disheartened the Latvian people.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The roadway bend where highway painters practice their craft looks like expressionist art.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

Known as the "Kissing Bridge" for its privacy, it also happens to be the last covered bridge in Ontario.

A 1975 bylaw prohibits the construction of any building that would block the view of this Gothic Revival church.

This building's metal facade is the last of its kind in all of Canada.

This statue is dedicated to the animal cosmonauts that perished during space flight experiments.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

This Canadian monument to the man who invented the telephone allows visitors to get up close and personal with the artifacts of his life.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

This mill on Lake Erie appears to shrink as a viewer approaches thanks to an optical illusion.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

It took over 100 years to decode this enigmatic epitaph for two buried brides.

A school teacher's massive and terrifying self-built castle.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

To find the "unicorns of the deep" you've got to go downstairs.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

The beloved home to all publications indie, erotic, and punky.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.