From lefty Jewish gathering site to hip cultural site in just 80 years.

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

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

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

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

Con Edison’s exotic and heat-loving pests.

Home to first responders to Greenpoint's devastating oil fires.

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Walk into the 19th century without leaving Brooklyn.

A hidden architectural treasure in New York's Brooklyn.

Brooklyn's most iconic restaurant, resurrected.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

Ride the subways of yesteryear.

Check out the underground party scene at the "Burning Man of Brooklyn."

One of the deadliest American air disasters is nearly forgotten in Brooklyn.

Sniff the Titan Arum's rotting flesh.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.