A hands-on traveling collection of the innovative devices of yesteryear.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A semi-scholarly approach to sex.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

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

This permanent exhibition of commercial signs aims to preserve the cultural heritage of the city.

This exuberantly curated landscape is one of the largest sculpture gardens in Canada.

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

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

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

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.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

Finally, you don't have to be a pious Swedish seaman to relax like one.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

An unassuming secret door once led to a legendary watering hole.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

As communication goes completely wireless, this Maine museum remembers all the wires that got us to this point.

The world's largest rotating world.