Largest Roman Catholic church in North America.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A wondrous old library overlooking the nation's capital.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

Century-old shop, specializing in Occult products.

A daily replay of the experiment that proved the rotation of the Earth.

An Irish Memorial commemorating those who perished due to potato blight.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A downtown park built on top of unclaimed graves.

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

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

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

What happens when a sculptor has to find a way around a 100-year-old copyright.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A bizarre house filled with an astounding array of collections.

A walk through the historic city center, under the streets of Seattle.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.