The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

One of the largest trees of its kind in California.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

One of the most easily accessible examples of the rare 1960s UFO houses.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This ancient Egyptian obelisk still bears the wounds of World War I.

The bronze uniforms commemorate the vital role of women during World War II.

A colorful square marks the heart of the city's LGBTQ community.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

The colorful, smiling concrete silos of Vancouver.

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

This whimsical fountain pays tribute to Toronto's four-legged friends.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

This giant roadside fruit is home to an array of apple-based treats.

The first transatlantic wireless signal was received at this 17th-century fort.

This historic lighthouse has been reincarnated as the perfect picnic place.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

The stone barriers in this historic fishing village were once used for farming and gardening.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.