The second-biggest state in America, Texas is dotted with several appealing cities, including music and food-focused Austin, bustling Houston, arts and culture-rich Dallas-Fort Worth, and San Antonio, where the River Walk is not to be missed.

No place on Earth quite compares to Antarctica, this stunning and vast continent is cold and windy, containing 90% of the ice in the world. Those who brave a visit here are rewarded with beautiful glaciers that must be seen to be believed, and a vast array of wildlife such as whales, penguins, Arctic foxes and seals.

If you find yourself in Rotterdam, there's a strong chance you've arrived by water. This popular port city (the second largest in the Netherlands) has gone through an architectural renaissance since World War II, with daring, innovative structures dotting the city (cube houses!) and defining its skyline. Café culture is on the rise here, so grab yourself a table and a cup.

This resort town is the gateway to the ruins of Angkor, a complex of stone buildings includes the main temple, Angkor Wat. When you have finished exploring the temples, this chic city has plenty to offer with world-class restaurants, hotels, spas and shopping.

An island of international renown, Hydra is one of the first islands to have been discovered by tourism and, due to the short distance from Athens, has for years hosted a large number of tourists.