PHOTO: The Sagrada Familia Cathedral in Barcelona. (Photo courtesy Tourism Institute of Spain)

There are so many beautiful monuments to see in Europe that will take your breath away, from the Parthenon in Athens to the Atomium in Belgium. Whether you are backpacking through Europe or can just visit one country at a time, make a list of your own must-sees and work with a tour operator, such as Travel Impressions, to book your trip.

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Rome, Italy: Both The Trevi Fountain and the Coliseum have to be seen on your visit to this country’s capital. Bring some coins too, because the legend of The Trevi Fountain says that tossing a coin into it ensures a return to this great city. The Coliseum, built more than 2,000 years ago, is an amphitheater that was once able to hold 50,000 spectators and hosted the Roman gladiator contests.

Pisa, Italy: The Leaning Tower of Pisa is one of four buildings that make up the cathedral complex Piazza dei Miracoli (which means Field of Miracles). The story behind the lean is that it was built straight, but due to being constructed on soft soil, started to lean during construction.

Barcelona, Spain – Barcelona has become a destination for world-famous architects, many inspired by Barcelona's native son, architect Antonio Gaudi. Because of that, you must see The Sagrada Familia, an amazingly beautiful Roman Catholic Church that was designed by Gaudí in 1882, but it is still unfinished.

Paris, France: It’s one of the most romantic cities in the world and The Eiffel Tower, Paris’ tallest structure, is one of the places that lovers like to snap a photo. Built in 1889, it was the entrance to that year’s World’s Fair and was only supposed to last for two years. It includes restaurants, a champagne bar and, of course, gift shops.

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Athens, Greece: It’s all about the Acropolis, which contains the Parthenon, a temple dedicated to the goddess Athena.

London, England: There are two can’t-miss monuments on your trip to London. First, make sure to visit Big Ben and the Houses of Parliament. Big Ben is often used to describe the tower, the clock and the bell but the name was first given to the Great Bell. The building’s famous tower is now called the Elizabeth Tower. Then, it’s on to Buckingham Palace, the official London residence of the British sovereigns with the accession of Queen Victoria in 1837.

Brussels, Belgium: Speaking of the World’s Fair, the Atomium is a building in Brussels that was originally built for the 1958 Brussels World's Fair.

Budapest, Hungary: Make a stop at the Hungarian Parliament Building, the seat of the National Assembly of Hungary in Lajos Kossuth Square, on the bank of the Danube. It is currently the largest building in Hungary and the highest building in Budapest.