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

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A much-maligned monument to teetotalism.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A celebrity from the late Cretaceous period.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The romance of early commercial flight still fills this Art Deco destination.

Largest Roman Catholic church in North America.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A line of blue paint marks the route of the inaugural parade.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A small, peaceful sculpture garden with a grim memorial to a disaster that took place a few blocks away.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.