An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Berlin's old airport.

Cold war icon and onetime "hole" in the iron curtain.

This bridge was constructed from the rubble of the infamous Bastille.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The celebrated eyesore created by starry-eyed sweethearts.

A beautifully eclectic mix of architectural styles.

Amsterdam's Red Light District leaves little to the imagination.

Ruins of a once-prized railroad station in New York.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

Lost subway station nestled beneath Toronto's busy commuter line.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Solitary monument dedicated to the beauty of nature.

A snake farm famous for its venemous varieties.

An art museum with an eclectic design and a scandalous past.

Beautiful public park off the beaten path and away from tourists.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

A 125-meter long "tribute to the Brazilian people."

Plot your trip through the city on the sidewalk.

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

The bookstore with bookshelves built into unlikely places.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."