This city was made for walking. Stroll grand boulevards with sweeping views of the city, pristine parks with trees planted in perfect rows, and narrow streets crowded with vendors selling flowers, pastries and cheese. Then head to the Île de la Cité, a small island in the Seine, to see Notre Dame Cathedral.

The world's largest art museum, the Louvre is housed in a Medieval fortress-turned-castle so grand it's worth a tour itself. You walk through the 71-foot glass pyramid designed by I.M. Pei and added in 1989, and step into another world--one with carved ceilings, deep-set windows, and so many architectural details you could spend a week just admiring the rooms. The Mona Lisa is here, as well as the Venus de Milo and Winged Victory (the headless statue, circa 200 BC, discovered at Samothrace). The Louvre has seven different departments of paintings, prints, drawings, sculptures and antiquities. Don't miss the Egyptian collection, complete with creepy sarcophagi, or the collection of Greek ceramics, one of the largest in the world. (Please note the Louvre is closed on Tuesdays.)

What's that huge white arch at the end of the Champs-Élysées? The Arc de Triomphe, commissioned by Napoleon in 1806 after his victory at Austerlitz. Your licensed local guide will elaborate on this, and other Parisian landmarks. See some of the most famous sites, including the ornate, 19th-century Opera, the Presidential residence, the ultra-chic shops of the Rue du Faubourg St-Honoré, and the gardens of the Tuileries. You'll pass the Place de la Concorde, where in the center you’ll find the Obelisk of Luxor, a gift from Egypt in 1836, and the Place Vendôme, a huge square surrounded by 17th-century buildings. Spot chic locals (and tons of tourists) strolling the Champs-Élysées. Look up at the iron girders of the Eiffel Tower, built for the 1889 World's Fair to commemorate the centenary of the French Revolution. See Les Invalides (a refuge for war wounded), the École Militaire (Napoleon's alma mater), and the Conciergerie (the prison where Marie Antoinette was kept during the French Revolution).

See the city from the water on an hour-long cruise along the River Seine. The Seine cuts right through Paris, dividing the city in half. See the Eiffel tower rising up on the Left Bank, the walls of the Louvre on the Right Bank. A guide will point out other monuments and architectural marvels as you pass, many of which are illuminated by clear white light at night.

On the Mediterranean coast, five miles from the Italian border, lies the tiny, glittering independent state of Monaco. Ruled by the Grimaldi family since the 13th century, Monaco is the epitome of French Riviera glamour. Your Tour Director will lead you on this brief adventure. Charles III opened a casino in the 1850’s to avert financial straits; needless to say, his plan worked--so well, in fact, that Monaco is a nearly tax-free state. Drop in on Prince Rainier (OK, see his house, the Palais du Prince), and visit a parfumerie in nearby Èze, where rich scents are made from local flowers such as jasmine, rose, and lavender.

The Côte d'Azur's largest city spills down the hillsides to pebble beaches that line the shore. Your Tour Director will show you around the narrow pedestrian streets and tiny squares of "Le Vieux Nice" (Old Town), which is sprinkled with old palaces and mansions. Stroll down the Promenade des Anglais, which runs parallel to the water. Backed by Nice's grand hotels, the Promenade was built in the 19th century for the British who flocked here en masse.

Stop in Pisa to see the famous leaning bell tower. It was already partly finished when builders realized that -- surprise! -- the ground beneath was too soft to support it. They tried to correct the tilt by putting a slight bend in the structure, but the extra weight just made it tilt more. Famous as it is, the leaning tower is just one component of Pisa’s Campo dei Miracoli (Field of Miracles). Rising from an immaculate green lawn, the baptistery, duomo, and tower are fine examples of Pisan Romanesque architecture. All three are clad in intricately carved black and white marble, and on bright summer days their brilliance can be blinding.

Immerse yourself in the charms of old-world Firenze, a red-brick splendor set in the rolling green hills of Tuscany. The birthplace and focal point of the Italian Renaissance, Florence still has the masterpieces to prove it. Brunelleschi’s elegant Duomo (dome) dominates the skyline, and around every corner is an architectural triumph filled with wall after wall of incomparable art. Your local licensed guide will take you to Giotto's Bell Tower and the aptly named Gates of Paradise, the bronze east doors of the Baptistery that spurred the burgeoning Renaissance. The boy guarding the Palazzo Vecchio with his slingshot is just a copy of Michelangelo’s David; the real statue is over at the Accademia. Don’t overlook the tombs of Michelangelo, Galileo, and Machiavelli at the Chiesa di Santa Croce, and definitely don’t overlook Florence’s amazing leather goods. Check them out when you visit one of the area’s famed workshops.

Pope Gregory IX laid the first stone of the Lower Basilica the day after the canonization of St Francis, on July 17, 1228. Two years later the saint's body, that had been resting in the church of San Giorgio (the future church of St Claire's) was brought here in secret for fear of looting by tomb raiders and buried in the unfinished church. No date has been recorded concerning the start of works on the Upper Basilica, but it must have been after the abdication from the order of Brother Elia in 1239, who had hitherto directed the works on the Romanesque Lower Basilica. Both churches were consecrated by Pope Innocent IV in 1253.

Baroque-en hearted? Revive your spirits with a walk past Rome's most beautiful and unusual Baroque fountains. At the foot of the Spanish Steps, elegant cafes once favored by visiting Brits and Americans surround the central fountain. The water pressure here was so low that the artist had to sink the fountain into the ground to get any water going through it, so he went ahead and designed the fountain to look like a sinking ship. There's no shortage of water pressure at the nearby Trevi Fountain, a Baroque extravagance designed by master sculptor Bernini. At the Pantheon, you'll see the largest concrete dome ever constructed. An oculus, or hole, in the dome lets sunlight into the beautiful temple, dedicated to all the gods.

Gods and gladiators, glory and gore. Ancient Rome lives on in its spectacular monuments, flavoring the frenetic present with tastes of the past. Don a space-age Whisper headset to get the inside scoop on the most spectacular, the Colosseum, a grisly battle arena that seated more than 45,000. An enormous retractable roof awning system kept spectators cool on sunny days. The nearby Forum provides a glimpse into everyday ancient life, with markets, meeting places, and temples all combined into one vast space. Move into Christian Rome at St. Peter’s Basilica, the triumphal Renaissance church flanked by rows of columns radiating outward like welcoming arms. Within the church Michelangelo’s masterpieces are on display, the “Pietà” in the main church and the recently restored ceiling frescoes and “Last Judgment” in the Sistine Chapel. Continue your trek through time at Piazza Venezia, site of the enormous monument to Victor Emmanuel II, Italy’s first king, and of the Palazzo Venezia, where Mussolini set up his headquarters and from whose porch his mother was said to eavesdrop on citizens below. (The Sistine Chapel is closed on most religious holidays and Sundays, except for the last Sunday in each month).