There is a difference between islands and continents in terms of geology.[8][9] Continents are the largest landmass of a particular continental plate; this holds true for Australia, which sits on its own continental lithosphere and tectonic plate (the Australian plate). By contrast, islands are either extensions of the oceanic crust (e.g. volcanic islands), or belong to a continental plate containing a larger landmass; the latter is the case of Greenland, which sits on the North American plate.
Almost all of the Earth's islands are natural and have been formed by tectonic forces or volcanic eruptions. However, artificial (man-made) islands also exist, such as the island in Osaka Bay off the Japanese island of Honshu, on which Kansai International Airport is located. Artificial islands can be built using natural materials (e.g., earth, rock, or sand) or artificial ones (e.g., concrete slabs or recycled waste).[14][15] Sometimes natural islands are artificially enlarged, such as Vasilyevsky Island in the Russian city of St. Petersburg, which had its western shore extended westward by some 0.5 km in the construction of the Passenger Port of St. Petersburg.[16]
The Moroccan city has attracted an artistic crowd since the 1960s, when everyone from Yves Saint Laurent to Mick Jagger fell for its vibrant sensory landscape. Now the city’s cultural scene is being reinvigorated, thanks to two landmark happenings in the world of art and design. First came last October’s launch of the YSL Museum — a striking geometric building next to the Jardin Majorelle, which Saint Laurent and his partner, Pierre Bergé, bought and restored in the 1980s. Then, in February, the 1:54 Contemporary African Art Fair will debut at the storied hotel La Mamounia. Marrakesh has had an art biennial since 2005 — the next is slated for 2020 — and the city is home to a number of well-regarded galleries. But the arrival of 1:54, which has editions in London and New York and draws names like Billie Zangewa and William Kentridge, is set to position the city as a hub for African art. There’s also hotel news. Oberoi is poised to open its third African property here, a lakeside resort surrounded by citrus orchards. And Royal Mansour has added a 6,450-square-foot pool flanked by seven air-conditioned cabanas. —Flora Stubbs
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The capital may be set on banks of the Potomac, but it’s never had a reputation as a great waterfront city. That could all be about to change, thanks to the $2.5 billion, 24-acre District Wharf, which opened in October just south of the National Mall. The shiny new InterContinental Washington D.C.-The Wharf offers access to the development’s new parks, music venues, 50-plus shops, and 20 restaurants — which include projects from area chefs like Fabio Trabocchi, Mike Isabella, and wunderkind Kwame Onwuachi. This is also set to be a banner year for culture: the Freer and Sackler galleries, sister museums that champion Asian art, recently reopened after a 20-month renovation, the National Gallery of Art will host the first-ever show dedicated to Cézanne’s portraits from March to July, and the Kennedy Center continues its inaugural season of hip-hop programming curated by Q-Tip. —Brooke Porter Katz
Political strife and economic woes have taken a toll on Egypt’s tourism industry in recent years, but travelers will soon have a new reason to visit. On the arid plains of Giza not far from the Great Pyramids, a modern monument is under construction that’s more than two decades and nearly $1 billion in the making. The Grand Egyptian Museum will showcase the finest treasures of the pharaohs — including the body and golden funeral mask of Tutankhamen — in a structure spanning nearly 650,000 square feet. 

Move over, Croatia. Long overshadowed by its neighbor to the northwest, Montenegro is ready for the spotlight. The ancient city of Kotor is already attracting plenty of visitors, like the celebrities vacationing at luxurious boutique hotel Forza Terra, just outside the medieval walls, not to mention the hundreds of thousands of cruisers who’ve arrived with companies like Viking, Celebrity, and Princess. The swank marina Porto Montenegro is thriving in the formerly sleepy coastal town of Tivat, and the complex’s Regent hotel unveiled an expansion in 2017. Nearby, luxury development Luštica Bay is slated to open this summer, with plans for villas, a golf course, and a five-star Chedi hotel. Further west on the Bay of Kotor’s jagged coastline is the site of the country’s most anticipated arrival, the One&Only Portonovi, which will be the brand’s first European outpost when it opens this summer. Plans for the resort, situated on a 60-acre site overlooking the Adriatic, include 140 villas and residences, a tennis club, and a spa. —Meredith Bethune

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