The Trevi Fountain is a - if not the - baroque masterpiece. Found in the very centre of Rome, Italy, its gaudy extravagance has wowed tourists since 1762.

The fountain marks the end of the Acqua Vergine, the aqueduct that replaced the ancient Roman Aqua Virgo.

It took over a century for the fountain to go from paper to stone. In 1629, Pope Urban VIII set out to build a new city fountain, but it was in 1730 under Pope Clement XII that construction began.

Thirty years and two popes later, it was finally finished.

It's baking here. Roman summers are notoriously hot. Let's get out of the sun and find the fountain. Stay on this slide and point & click to explore the streets.

There it is, you can't miss it! Let's take a closer look...

Four different sculptors were hired to complete the fountain's decorations: Pietro Bracci, Filippo della Valle, Giovanni Grossi, and Andrea Bergondi. Their designs combine practicality and symbolic power into one powerful artwork.

The sculptures describe the 'taming of the waters'. Mythological Tritons guide the seashell chariot of Oceanus, father of the river gods, which is pulled by half-fish, half-horse hippocampi. The raging waters of nature tumble into the calm pool of civilisation.

Gleaming white stones of the Château Grimaldi in the Mediterranean town of Antibes, France. On the Côte d'Azur between Cannes and Nice. For six months, Pablo Picasso and his lover Françoise Gilot lived here, entertaining friends between bouts of passionate painting.

While you're here, why not take in the picturesque market stalls and street dining of this beautiful town. Antibes was originally founded by the Greeks and developed by the Romans, but it owes many of its buildings to King Louis XV 'The Beloved'.

In Venice, the city of love, you'll find the Ca' Rezzonico, a former Baroque palace turned museum, dedicated to the salacious history of the 18th century, when Casanova raked from balcony to balcony, leaving exhausted courtesans in his wake.

Inside are grand ballrooms and paintings by Venetian masters Francesco Guardi and Giambattista Tiepolo. On this floor you'll also find the Salon of the Allegory, a room decorated by Tiepolo to commemorate the 1758 marriage of Ludovico Rezzonico Faustina Savorgnan.

Romance isn't all roses. Some lovers are more forward than others. Egon Schiele is one of those. The Leopold Museum in Vienna holds an enormous collection of works by the enfant terrible. With raw sexuality, and more, on display, you shouldn't be disappointed.

Head upstairs and you'll find even more. The collector Dr. Rudolf Leopold was ridiculed by many of his contemporaries for buying such 'pornographic' work, but thanks to him, we can admire the work of artists including Gustav Klimt, Richard Gerstl, and Ernst Ludwig Kirchner.

Florence, birthplace of the Renaissance, and the perfect city in which to renew your own romance. The city's world-renowned Uffizi gallery is home to many sensual works, including Sandro Botticelli's The Birth of Venus and Titian's Venus of Urbino.

If that doesn't sate your appetite, just outside the Ufizzi you'll find the Piazza della Signoria, sporting a reproduction of Michelangelo's hulking nude sculpture of David - with not a fig leaf in sight.

"I would rather look at you than all the portraits in the world, except possibly for the Polish Rider occasionally and anyway it’s in the Frick, which thank heavens you haven’t gone to yet so we can go together for the first time." So said poet & critic Frank O'Hara.

Perhaps you should take Frank's advice. The Frick is one of the most wonderful buildings in all of New York. And surrounded by all the Bouchers and Fragonards there'll be only one thing on your mind.

Alas, not all is meant to be. Time passes and hearts grow apart. Maybe we'll meet once again, in the Museum of Broken Relationships. Founded in 2010, this small museum collects personal objects left by former lovers and the secret confessions of present visitors.

Underwear found under beds… bottles of wine left unopened… even an axe used to destroy a cheating spouse's furniture. Let's hope we don't end up exhibiting here.

Wow, I didn't think you'd stay around this long. But let's be real, I'm here for a good time, not a long time, and I can't think of anywhere I'd rather be than a museum. Amsterdam's Erotic Museum is a must-see for any visitors to this free-spirited city.

High in the Central Balkan Mountains of Bulgaria, Buzludzha Peak is the site of many significant events in Bulgarian history, including the first congress of the Bulgarian Social Democratic Workers Party in 1891.

In 1974, the Buzludzha Monument was constructed here, in concrete and shining glass mosaics, to commemorate that moment of history and the people who made it possible.

Even today its architecture feels futuristic, like a space ship from another world. Though it's officially closed, the monument remains a favourite of urban explorers in Eastern Europe.

The former German colony of Kolmanskop became the centre of the Namibian diamond rush in 1908, when a worker named Zacharias Lewala found a small rough diamond.

Over the next few years, the town and its wealth grew. There was soon a hospital, ballroom, power station, school, skittle-alley, theatre and sports hall, casino, ice factory and the first tram system in Africa.

When the diamonds ran out, and a new patch was discovered some 270km south, many of the town's inhabitants simply packed up and left. In the years since, the desert sands have swamped the town.

Nicknamed the 'Chicken Church', this iconic prayer hall in the Javanese jungle was left unfinished, abandoned for years, until it found Internet fame.

Daniel Alamsjah devoted his life to building the multi-faith prayer hall after a religious vision. Designed to resemble a holy dove, many locals thought it looked more like a chicken.

Alamsjah ran out of money and faced ridicule for his design, until the strange structure was picked up by international media in 2015. The tourists his unique building attracted allowed him to carry on construction.

The dry, dusty town of Uyuni, Bolivia, has long been one of South America's most important transport hubs. But today it's best known as the final resting place of hundreds of steam engines.

Many of these were imported from Britain during the 19th Century, when there were plans to expand the continent's transport network.

But the collapse of the mining industry left many bankrupt and those plans in disarray. Instead of paying to move the the trains, they were simply left to be eaten up the harsh winds of the salt flats.

All is not as it seems at this ominous castle near Łapalice, Poland.These rotting ruins are actually still under construction.

Artist Piotr Kazimierczak only started building this structure in 1971. It was planned to be his personal studio, complete with swimming pools, ballroom, and twelve towers.

However his lofty ambitions met with some major problems: he ran out of money shortly after building the walls, and it turned out he'd built part of the castle on land he didn't own. Construction stopped, and local curiosity grew.

Built in 1971 and designed by architect Boris Magaš, this luxurious hotel on the Croatian island of Krk last welcomed guests in 2001. Today, while the building remains intact, the sci-fi interiors are destroyed.

The high, geometric ceilings, and white curving concrete mark this building as a modernist marvel. The hotel's casino, cocktail bar, swimming pools and saunas defied western expectations of eastern European hospitality.

Unfortunately, as the Yugoslav Wars broke out in the 1990s, the tourism industry collapsed. Throughout the conflicts, the hotel became home to refugees. The business never recovered, and closed in 2001.

This small British island in the southern Atlantic Ocean, not far from Antarctica, is quiet today, but was once the site of major sealing and whaling stations. Thankfully, the ships are now gone, and the wildlife is safe again.

At first sight, this lone 14th-century bell tower, found near the village of Graun in northern Italy, doesn't appear like much...

...but it's the sole surviving building of the old village which, along with the nearby village of Reschen, was deliberately flooded in 1950 during the building of the artificial Lake Reschen.

When water levels are low or when ice covers the lake in winter, you can walk all the way up to the tower itself. Local legend says that on quiet nights you can still hear the ghostly ringing of bells.

The hill town of Craco in southern Italy, dates back nearly 1000 years, but was abandoned at the end of the twentieth century after a series of devastating landslides.

The evacuation of the town began in 1963 after a number of landslides, with many of the inhabitants moving down into the valley. In 1972 a flood damaged even more buildings, and in 1980 an earthquake destroyed what little was left.

The striking silhouette of the hill town and its eerie ruins have since become a sight for tourists and film crews.

This artificial hill overlooking the city of Berlin was made shortly after the Second World War, when an unfinished technical college was covered with demolition rubble. The US military then built a radar station on top of the hill, to spy on Soviet communications.

The listening station, officially known as Field Station Berlin, was constructed in October 1963, and operated until the fall of the Berlin Wall and the end of the Cold War. The equipment was removed, but the structure and protective domes remained, waiting to be explored.