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.

View the Notre-Dame Cathedral. Work began in 1163 on a spot that had been a holy shrine since Roman times. Over the centuries, the cathedral has been the scene of some of France's most momentous occasions, including the coronation of Napoleon.

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 and the Place de la Concorde, where in the center you’ll find the Obelisk of Luxor, a gift from Egypt in 1836. 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) and the École Militaire (Napoleon's alma mater).

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.

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.)

A local guide will lead your adventure in Milan, Italy's capital of fashion and finance. See the renowned La Scala opera house, with Europe's largest stage. The city's marble Duomo took almost 450 years to complete, and is the world's largest Gothic cathedral. On clear days, its 135 spires can be seen from the Alps.

Stroll around the four-story covered double arcade of shops in the Galleria Vittorio Emanuele II; it was originally designed in 1861 and built by Giuseppe Mengoni between 1865 and 1877. The imposing street is covered over by an arching glass and cast iron roof, and the central octagonal space is topped with a glass dome. The Galleria connects two of Milan's most famous landmarks, the Duomo and the Teatro Alla Scala.

The Teatro alla Scala was founded under the auspices of the Empress Maria Theresa of Austria to replace the Royal Ducal Theatre, which was destroyed by fire on February 26, 1776, and had until then been the home of opera in Milan.

The ultimate symbol of Ancient Rome, the Colosseum still dominates the modern city. Tour the amphitheatre with your local licensed guide. Built by the emperor Vespasian in A.D. 72, the structure held almost 50,000 spectators but was so well organized that the entire place could be emptied within 15 minutes. Inside, the spectacles varied from gladiator battles to immense naval contests to wild beast shows, in which thousands of exotic animals like giraffes and ostriches were popped into the stadium through trap doors and left to fight Roman hunters. See the system beneath the floor that operated the trap doors and housed the animals, then continue on to the relative calm of the Forum. Ancient Rome’s commercial, religious and political center, the Forum held markets, temples and the Senate House. Near the Rostra, or speaker’s platform, you can still see game boards scratched into the marble by bored politicians--anyone up for a game of tic tac toe?

Tour the ruins and excavations of the Roman Forum, which features the remains of magnificent temples, basilicas, and triumphal arches that once formed the heart of the Empire.

Visit St. Peter’s Basilica where from the outside, the church has four rows of columns that radiate out like welcoming arms; inside, the church seems enormous enough to embrace the entire world. The dome, partially designed by Michelangelo, rises 452 feet above the ground. Michelangelo’s mark is everywhere here, from the costumes worn by the Swiss Guards to his exquisite “Pietà” sculpture (the only sculpture he ever signed) to the amazing frescoes of the Sistine Chapel. Because he considered himself a sculptor and not a painter, Michelangelo hated working on these paintings, now considered masterpieces.

Take a walk past Rome's most beautiful and unusual Baroque fountains. At the foot of the Spanish Steps, elegant cafes 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.

View the Trevi Fountain, where it is traditional to toss a coin into the fountain to ensure a safe return to the Eternal City.

We will spend some time in the Piazza Navona area. Built on the foundations of Domitian's Circus, this magnificent square was designed by Borromini in 17th century. It is full of life and is highlighted by one of Rome's most spectacular fountains, the Four Rivers designed by Bernini. The square is often filled with local artists. The surrounding neighborhood is also one of the best places in Rome to get a tasty tartufo or gelato ice cream