Copenhagen's celebrated theme park and gardens.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

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

The celebrated eyesore created by starry-eyed sweethearts.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

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

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

The magic's in the hole!

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Quite simply the largest tree in the world (by volume).

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A former major munitions plant that has been converted into a sprawling art space.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The most confusing clock in New York.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

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