A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Elevated freight railway turned wildly successful urban park.

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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.

Yo, Adrian!

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

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

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

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

A historic Montreal market that was the city's agricultural hub for over century.

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

This 1967 experiment in modular architecture was designed to be a new model for urban living.

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

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

The beautiful baroque library of the Hapsburg empire.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

An overlooked memorial honoring the local Washington residents who died in World War I.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.