The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

This natural sea cave hides a small wonderland of natural turquoise beauty.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

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

Historic psychiatric asylum and most-filmed location in the Great White North.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

This Elizabethan hedge maze is one of only six in North America.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

Macabre museum devoted to historical Viennese murders.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The oldest surviving synagogue in New York City is now a soaring art space.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

More gold than anywhere else, ever.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Try not to get slimed in Tribeca.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A crumbling hospital from the 1850s on Roosevelt Island.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.