A controversial blue hoop has been puzzling freeway drivers since 2013.

The New Central Library is a masterpiece of contemporary architecture in the midst of downtown Calgary.

This First Nations monument is a peaceful spot with vast views of the Calgary prairie.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Eighty million natural history specimens call this gargantuan museum home.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

These barriers stand as stark reminders of Northern Ireland's troubled past.

A museum marks and documents the site of the Titanic's launch.

These engineering masterpieces are a dominant feature of the Belfast skyline.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

This demon atop the Notre-Dame de Paris looks utterly bored.

A beautiful and classically designed villa, with an hourly infestation of monsters.

These picturesque structures speckle the hill above the monastery.

Pyongyang’s Arch of Triumph is the second tallest triumphal arch in the world.

A restaurant modeled after feudal Japan, where the waitstaff are trained as ninjas.

Every autumn, this hillside is ablaze with red summer cypress.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”