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

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

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Sports history, made in the Arroyo Seco.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

Mai Tais and Navy Grog served up in one of the original tiki bars.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

There aren't too many operational funiculars around, but Pittsburgh has two!

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

This dramatic rail curve was once the target of a failed Nazi attack.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.