Every year more than 10 million Chinese citizens make the journey to Europe, with Germany a firm favorite on their list. But it’s not Berlin or the beer gardens of Munich that are the biggest draws. More than any other German city, Chinese tourists are heading to Trier, a small city in the west of the country.

Trier is Germany’s oldest city. It’s rich in Roman history and wine culture, and visitors from all over the world usually stop by the monuments such as the Porta Nigra or come to enjoy a glass of the local Moselle wine. For the 150,000 Chinese tourists who visit Trier every year, however, the main attraction lies in the city’s link to Karl Marx.

The well-known philosopher Karl Marx was born in Trier on 5 May 1818 and spent his first 17 years in the city before leaving for Bonn, Berlin, and Paris. “Karl Marx is one of the city’s most famous sons although he left early,” said Trier mayor, Wolfram Leibe.

Actually, Trier is packed with points of interest for anyone looking for traces (痕迹) of the city’s most famous son. First on the list for many visitors is the bronze statue of Marx by Chinese sculptor Wu Weishan. Crowds of tourists queue up to take a picture with the likeness. A few meters away, the famous German philosopher can even help you cross the street: special traffic lights bear Marx cartoons in. place of the traditional green and red figures. The Karl-Marx-Haus Museum on Brückenstraβe offers more details about the revolutionary’s life and work, while its Baroque façade (巴洛克风格的外墙) is another photo hotspot.

This “red tourism” has shown an obvious influence on business in Trier. Restaurants, cafés and wine houses are filled with such new creations as the “Marx-Schnitzel”, Karl Marx chocolates or a bottle of wine branded “Das Kapital”.

The South Rim of Grand Canyon National Park in Arizona will be open with limited services. Here’s how it will work, according to a statement from the park:

The south entrance (near Tusayan) will be open from 4 to 10 a.m. Visitors who are inside the park by 10 a.m. can remain until sunset.

Admission fees can be paid by way of machine at the gate (the entrance booths will not be staffed) or by purchasing a pass in advance at third-party sellers such as the Valle Travel Stop at State Route 64 and U.S. 180 or in Tusayan at the Grand Canyon Chamber & Visitors Bureau, Grand Canyon IMAX Theater, Grand Canyon Plaza Hotel or Red Feather Lodge.

Day hiking on inner canyon trails

Limited food and beverage service at Market Plaza, Bright Angel Bicycles, EI Tovar patio and nearby hotels. Bring you own water and snacks just in case.

Bicycle and wheelchair rentals at Bright Angel Bicycles.

The Rim Trail and Greenway Trail system outside of the residential area.

Desert View Drive is open as far east as Navajo Point, where vehicles will have to turn around.

The cast entrance and Desert View Watchtower area.

Visitor centers, museums and shuttle buses.

Hotels, restaurants, campgrounds, camper services and trailer village.

Center Road and access through the South Rim residential housing area.

The North Rim, Colorado River and the Tuweep area of Grand Canyon-Parashant National Monument.

More: Grand Canyon's North Rim closed indefinitely Visit nps.gov/grca for more information.

For questions about backcountry reservations, email grca_bic@nps.gov.

Reach me at jill.cassidy@arizonarepublic com or follow me on Twitter@JillHikes.

Here is a guide to the best countries to see the Northern Lights, as well as top tips such as the best time to go.

★Where to go: Greenland

Kangerlussuaq is often regarded as the best spot in Greenland, with over 300 nights of clear skies. Alternatively, you can visit the capital city of Nuuk, where on clear nights, there have been plenty of sightings of the Northern Lights. And in the southern regions, darkness tends to fall earlier in the evening, ideal for those who don't want to stay up all night.

Best time to go: From November through to April

★Where to go: Norway

Head to the northern regions of Norway for the best possible chances of seeing the Northern Lights. Head to Svalbard, one of the world's northernmost inhabited areas, and you'll feel like you've stepped into an ice kingdom. Those who love the great outdoors might want to check out the Lyngenfjord region, where you'll find plenty of tours to see the Northern Lights. whale watching, skiing, ice climbing and so on!

Best time to go: From October through to March when the polar nights make them easier to spot.

★Where to go: Sweden

Head to Abisko National Park where the clear skies and lack of light pollution make for ideal Northern Lights viewing conditions. One of the best spots is in Swedish Lapland, where you can have dinner under the midnight skies. Hikers might also consider trying the Kungsleden hiking trail, which offers about 440km of breathtaking landscapes.

Best time to go from September through to March.

★Where to go: Iceland

You don't need to go to the remote landscapes to spot the Northern Lights. In fact, sightings are possible from Iceland's capital of Reykjavik.Want to escape the crowds? Head to lesser-known spots such as Thingvellir, which is the place where photographers try to capture the perfect Northern Lights photo.

Best time to go: From late August to mid-April, although you will increase your chances if you visit from late September through to March.