While beach vacations may be a great way to take your mind off work，lakes surrounded by mountains make for an even grander experience．If you are looking for some peace on your vacation，we have some recommendations for you in the Caucasus(高加索)．

Lake Sevan

    Lake Sevan is situated in the central part of Armenia，in the Gegharkunik province．It is the largest lake in Armenia，located 6,200ft above sea level．Along the lake shore，there are various accommodations such as resorts and hotels with plenty of activities to partake in such as windsurfing，swimming and sunbathing．While there，do not forget to visit one of the famous cultural monuments，the Sevanavank Monastery，and it offers a great view of the lake as well．

Lake Paravani

    Lake Paravani，located at 6,801ft above sea level，is in the south of Georgia，near the Javakheti plateau．At this level，altitude sickness can occur and it is a good idea to be prepared to adapt to it properly，or bring medication for altitude sickness．Being a volcanic lake makes for a more interesting experience．The lake is best known for fishing．Do not come home during the winter months when the lake freezes．

Lake Cildir

    Lake Cildir is located in the Ardahan province，East Turkey，near the borders of Georgia and Armenia．It is the second largest freshwater lake of Eastern Turkey，and many tourists are not aware of this beautiful attraction．Lake Cildir is surrounded by mountains of the Caucasus．The lake freezes during late November．If the winter is not extremely cold，you can try some lake activities like ice skating and ice fishing．

Lake Van

    Lake Van is the must visit of all lakes in this list．The largest lake in Turkey，Lake Van is located on the eastern shore of Turkey and is also the most accessible lake here．It's situated at 5，380ft above sea level，and unique to lakes around the world，the water is high in salt content．

    Visitors must present all carried items for inspection upon entry. After inspection, all bags, backpacks, umbrella, parcels and other items as determined by security officers must be left at the checkrooms, free of charge, close to each entrance. All oversized bags, backpacks and luggage must be left at the checkrooms near the 4^th Street entrance of either the East or West Building. These items will have to be x-rayed before being accepted. Items of value, such as laptop computers, cameras and fur coats, may not be left in the checkrooms but may be carried into the gallery. We regret that the museum doesn't have enough space for visitors items larger than 17*26 inches in the gallery.

    Additional security procedures and checks may be taken according to the decision of the gallery.

    *For the safety of the artworks and other visitors, nothing may be carried on a visitor's back. Soft front-baby carriers are allowed, but children may not be carried on shoulders or in a child carrier worn on the back. Wheelchairs are available free of charge near each checkroom.

    *Smoking is prohibited. Food and drink are not permitted outside the food service areas. Unopened bottled water may be carried only in a visitor's bag. Cell phones may not be used in the gallery.

    *Animals, other than service animals, are not permitted.

    *Skateboarding is prohibited.

    *Picture-taking(including video) for personal use is permitted except in the special exhibits.

    *Please don't touch the works of art.

    If you are travelling in Britain, besides so many world-class things to see and do in London, planning a day trip away from it can also be worthwhile.

    Stonehenge

    Stonehenge consists of a group of huge standing stones. The 5,000-year-old stones are one of the world's biggest mysteries that no one has figured out yet. While exploring Stonehenge, you can imagine wildly and decide for yourself how the stones came to be there and why. Although you can't touch the stones, you can walk among them and feel the changes of seasons.

    Windsor

    Most people visit Windsor to see Windsor Castle, where the Queen spends most of her time. The castle itself could keep you busy for days. The best way to appreciate Windsor Castle is to approach via the Long Walk, a straight road where there are no cars, but you might see some deer.

    Oxford

    Oxford is best known for its world-famous university. The large student population keeps the atmosphere young and fresh, though there's no shortage of history if you want it. 30 colleges make up the university itself. A tour of the colleges is a must—Harry Potter fans will recognize various locations used in the movies.

    Bath

    Founded by the Romans, who used the area's springs to create a spa retreat（水疗中心）, Bath's now the best tourist attraction of Southwest England. Visitors never miss the Roman Bath Complex, which is divided into four main parts—the Bath House, the Sacred Spring, the Roman Temple and the museum, which displays fascinating finds from the historical ruins of the city.

    A 60-year-old homeless woman named Smokie has been sleeping outside in the dirt a few doors down from a man named Elvis Summers.

    Most mornings, she stops by Elvis's Los Angeles apartment and asks if he has any recyclable materials for her. Through these conversations, they struck up a friendship.

    One morning, Elvis saw a news article about man in Oakland who has been making tiny houses out of deserted materials. He was inspired to put off paying a few bills so he could buy the wood and hardware to make Smokie a brand new shelter. It took him five days to build it, and now, for the first time in ten years, Smokie has a place to hang the sign “Home Sweet Home”.

    “I had nowhere to really build it, so I just built it in the street outside of my apartment,” Elvis told Good News Network. “The local LAPD police have been super cool, and have told me they support it—as long as we move it to a different spot every 72 hours.”

    He made this pretty time-lapse(延时的) video showing how he did it. The materials, including two locks on the front door and strong wheels for moving it around, cost him about $500.

    “I've met so many homeless people, good people,” Elvis said in an email, “Since I built Smokie's , I've had several people asking me to make them a tiny home and it's turned into much more than just the one house I wanted to build.”

Although he runs an online retail store that sells EDM clothes, he has decided to launch an ambitious project to fund more shelters. He plants to get lighter and cheaper materials—without sacrificing the strength of the house—for the next round. Rick Sassen, a branch manager, kindly donated the roof shingles and cedar supporting Smokie's house, final items Elvis couldn't afford on his own. Sassen has promised to work out a deal on future building materials for the same cause.

    Fashions have a lot of rules. Most of them, however, are just wrong. But there's one rule that goes beyond tradition and into the field of scientific study of the brain: Black garments are slimming. It all comes down to how your visual system processes the light. The below holes in each square are the same in size, yet the white hole looks bigger than the black hole.

    In the 1500s, Galileo Galilei noticed that some of the planets looked larger when viewed with the naked eye (肉眼) than they did when viewed through a telescope, making the white light of Venus (金星) appear eight to ten times larger than Jupiter (木星) in the night sky. He knew something strange must be going on with his vision to cause this illusion, but he wasn't sure what it was. Luckily, scientists never stopped wondering, and in 2014, they figured it out.

    Our visual system operates via two main channels: "on" neurons (神经元) that are sensitive to light things and "off" neurons that are sensitive to dark things. When it came to the dark "off" neurons, the researchers found that they responded predictably to dark shapes on a light background — the greater the contrast between the two, the more active these neurons were. But the light "on" neurons behaved unpredictably. Even with the same amount of contrast, light objects on a dark background caused a greater response in these neurons.

    This makes some sense, evolutionarily speaking. In the dark of night, you'd want to be able to take in every bit of light you can get, so a visual system that enlarges light objects on a dark background could be very useful. However, it's not that hard to see dark objects in the light of day. It has some effects in the colors of your clothes and in the appearance of the planets—the brighter appearance of Venus in the night sky makes it look bigger than the darker Jupiter.

    Living in a foreign culture can be exciting, but it can also be confusing(令人迷惑的). A group of Americans who taught English in other countries recently discussed their experiences. They found that miscommunication was always possible, even over something as simple as "yes" and "no".

    On her first day in Micronesia, an island in the Pacific, Lisa thought people weren't paying any attention to her. The day was hot. She went into a store and asked, "Do you have cold drinks？" The woman there didn't say anything. Lisa repeated the question. Still the woman said nothing. She later learned that the woman had answered her: She had raised her eyebrows(眉毛), which in Micronesia means "yes".

    Jan remembered an experience she had in Bulgaria, a country in Europe. She went to a restaurant that was famous for its cabbage. She asked the waiter, "Do you have cabbage today？" He nodded his head. Jan waited, but the cabbage never came. In that country, a nod means "no".

    Tom had a similar problem when he arrived in India. After explaining something in class, he asked his students if they understood. They answered with many different nods and shakes of the head. He thought some people had not understood, so he explained again. When he asked again, they did the same thing. He soon found out that his students did understand. In India, people nod and shake their heads in different ways depending on where they come from. You have to know where a person is from to understand whether they mean "yes" or "no"．