Sofia's legislative center is continuously reinventing itself.

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

A vast Communist-era exhibition space in the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

Eastern Bloc nostalgia, anybody?

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

UNESCO-protected ancient burial ground.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

An abandoned saucer-shaped monument in the Bulgarian mountains.

One of the last remaining buildings from one of Calgary's earliest businesses.

A Victorian garden in a harsh climate at the border of the prairies and foothills of the Canadian Rockies.

To get to or from this Canadian ghost town, you'll need to cross 11 single-lane bridges.

Decorated by local artists, the city's utility boxes have become three-dimensional canvases.

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

A herd of colorfully painted bovine statues can be found in the middle of "cowtown."

A stone troll guards the hike that leads to this waterfall.

The natural hot spring that was integral to the creation of Canada's first national park.

A seven-story wooden coal tipple stands this former mine, the last of many that once covered this area.

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

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.