If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

The first piece of public art dedicated to LGBT rights.

The site of the deadly Triangle Shirtwaist Factory Fire.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

Elevated freight railway turned wildly successful urban park.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Montreal's colorful subway station shows its support of the local LGBT+ community.

Two thirds of this Montreal neon icon has survived to flash another day.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

The biggest museum dedicated to insects in North America, one of the largest in the world.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.