Place des Vosges is one of the oldest and finest squares in Paris. Overlook the red bricks and dark tiles in warm and splendid colors painted by the late afternoon sun, one can't help being sentimental about that time passes and things change.

Although OpenStack had a full-day schedule, I still made some time to visit the new building of Louis Vuitton Foundation in the morning and The Palais de Chaillot in the afternoon.

Since it was built as a Fortress in the Medieval period, to the grand renovation in the Renaissance, to its opening to the public at the end of the 18th century, to today becoming the most prestigious Museum in the world, Louvre' architecture and collections are the greatest treasures of mankind.

With the peaceful Sacré-Coeur on the top of the height and winding alleys that still retain village-like style, just walking around Montmartre is a treat.

With the darkened sky and chilly wind, Paris suddenly felt like early winter. The rain finally came, those sculptures and fine buildings seemed gleaming more delicately and brightly in the rain.

After several sunny and warm days, a cloudy Paris allowed us to taste a different kind of romance of the city. Our focus of the city tour also shifted from the left bank to the right.

In a beautiful day of autumn, whether overlooking from the top of Notre Dame or cruising on the river boat, you will fall in love with the Seine.

Jardin du Luxembourg maybe lively and charming, but what surprised us was how so many people could sit around the pond in a weekday afternoon. French really know how to enjoy their lives! Well, maybe it's related to their 35-hour workweek rules. Weekend already starts on Friday afternoon.

The Latin Quarter is known for its niche bookstores, quirky boutiques, intimate bistros and cafés. Maze-like side streets are narrow and crowded. Home to a number of oldest universities in the world, its lively and romantic atmosphere attract students and intellectuals for more than 800 years.