But now, some travelers may be worried about visiting for a totally different reason.

On June 30, the Chinese government introduced a national security law in Hong Kong that outlaws "acts of secession, subversion of state power, terrorist activities and collusion with foreign or external forces to endanger national security."

The new law's Article 34 states that foreigners in Hong Kong could be "subject to deportation" if they contravene the law, even if they are not prosecuted. Meanwhile, Article 38 asserts that the law applies to offenses committed "outside the region" by foreigners who are not residents of Hong Kong or China.

This language has spurred discussions in countries such as the United States, Canada, Australia and the UK, prompting them to revise their respective travel advisories, warning citizens of increased risks and "surveillance," "detention" and "deportation" under the new law, which details a maximum penalty of life imprisonment.

"We can expect that visitors from the US and UK will decrease significantly (after Covid-19 restrictions relax) because both governments have expressed lots of concern about the safety and stability of Hong Kong. However, tourists from mainland China, which make up approximately 70% of Hong Kong's total (overnight) tourism arrivals, could feel safer and more willing to come to Hong Kong."

Will the law impact travelers?

Hong Kong welcomed 65.1 million visitors in 2018, according to data from the Hong Kong Tourism Board.

@ Didier Marti/Moment RF/Getty Images

According to a Hong Kong government spokesperson, the national security law should not affect the "vast majority of Hong Kong people including tourists and investors... who abide by the law and do not participate in acts or activities that undermine national security."

When asked for specific examples of what types of "acts or activities" would impact foreigners visiting Hong Kong, the spokesperson did not elaborate.

However, a Hong Kong Tourism Board spokesperson offered reassurances: "It's difficult to ascertain the impact of the national security law on Hong Kong tourism at the moment, but it is highly unlikely that bona fide tourists will be affected at all."

Designated a Level 2 (out of 4) risk level, meaning US citizens should "exercise increased caution," the advisory warns: "US citizens traveling or residing in Hong Kong may be subject to increased levels of surveillance, as well as arbitrary enforcement of laws and detention for purposes other than maintaining law and order (as a result of the national security law)."

Australia made a similar move, updating its travel advisory to read: "(The national security law) could be interpreted broadly. You can break the law without intending to. The maximum penalty under this law in Hong Kong is life imprisonment."

Professor Xin He, a Chinese law expert at the University of Hong Kong's Department of Law, calls these travel warnings "overblown."

"Tourists are extremely unlikely to offend those serious crimes specified by the law," he tells CNN Travel, noting that neighboring Macao, which is also a special administrative region of China, has similar laws.

"The law is trying to stabilize Hong Kong's situation and attract more tourists."

However, Benjamin Iaquinto, an assistant professor and tourism geographer at the University of Hong Kong, questions such comparisons.

"Yes, tourists still go to China (despite the local laws), they still go see the Great Wall and the Forbidden City and all that," Iaquinto tells CNN Travel.

"But those places are so remarkable that you're always going to get tourists to visit them no matter what. Hong Kong doesn't have places like the Great Wall or the Forbidden City, which might be a problem for the tourism industry."

'Tourists don't like risk'

Senior tourism lecturer Denis Tolkach, who recently transitioned from the School of Hotel and Tourism Management at The Hong Kong Polytechnic University to James Cook University in Australia, says experts are still wrapping their heads around the law.

"There was no draft available until it had passed through the legislature, so we only saw the text on July 1," says Tolkach.

"Most legal scholars are still trying to understand what the language means and what repercussions it will have -- that creates uncertainty. Tourists don't like risk and they don't like uncertainty."

A silver lining, he says, is that no one is heading to Hong Kong right now.

"You could say it's a good thing that currently there is no travel due to the coronavirus anyway. People have the time to decide whether they want to travel to Hong Kong or not, as they watch the situation unfold."

If no incidents involving tourists occur under the national security law after the borders reopen, he says the perceived risk will likely diminish.

"If you see that other people are traveling without any problems, people will be more relaxed," adds Tolkach.

"But you need to be informed about the place you are traveling to and respect the local customs, whether those are cultural or legal. So be informed."

Running afoul of the law

As experts grapple with what's illegal under the new legislation, Professor He says that common concerns such as "criticizing the leaders of China" on social media would not "fall into any of the crimes specified in the law."

He also says it would be "extremely unlikely or almost impossible" for tourists to be detained or extradited to mainland China.

However, providing "donations and other support to those criminals specified in the NSL (national security law) may be problematic."

Antony Dapiran, a Hong Kong-based lawyer, photographer and writer who is the author of "City on Fire: The Fight for Hong Kong," agrees that "ordinary people who have no political involvement or exposure and no public profile" would not be impacted.

Foreigners or members of the Hong Kong diaspora could be at risk if they "engaged in anti-government activism abroad," particularly if that activism was "directed towards either secession -- Hong Kong independence or, for that matter, other independence causes such as Taiwan, Tibet or Xinjiang -- or subversion of the Chinese government."

If business or leisure travelers have "engaged with foreign governments or organizations in furtherance of those causes," he says they could be considered criminals.

"Those who have an elevated risk profile -- such as people involved in anti-China activism abroad, or business travelers in industries and sectors which have an elevated risk exposure -- would no doubt consider their travel plans in light of the new law," says Dapiran.

Entering recovery mode

While the law may concern travelers from Western countries, experts agree that it could have the opposite effect on visitors from mainland China -- by far the city's largest and most important tourism market.

"In mainland China, people are not very used to seeing protests -- and this kind of social unrest makes people feel at risk," explains Tolkach.

"So if we look at the mainland Chinese visitors, the national security law is supposed to ensure the safety and security of Hong Kong -- (it's) something to be viewed positively by Chinese tourists, to reassure them."

"The major protests started in June (of 2019), but travel was not really affected until about August when the protests and the police response became more intense," says Tolkach.

"In November, because of the occupation of the universities -- including Hong Kong Polytechnic University and the Chinese University of Hong Kong -- arrivals dropped by about 50% ... it was most significant for the mainland Chinese market."

He says a lot of the fear stems from media coverage in mainland China.

"Media outlets in mainland China were portraying the protests very negatively, so it created a lot of uncertainty and Hong Kong felt like a risky destination."

By the end of last year, total arrivals had decreased 14.2% from 65.1 million in 2018 to 55.9 million in 2019.

In the coming months, Euromonitor researcher Yum predicts that Hong Kong tourism will see a sharp recovery once the government finalizes "travel bubble" agreements, which may allow quarantine-exempt travel between destinations like Thailand, Japan and mainland China.

"When Hong Kong reopens its borders, visitors from the Asia-Pacific region may rebound quickly," adds Yum.

However, the long-term impacts remain unclear.

Hong Kong's evolving image

Tourists rarely make decisions based on politics when it comes to choosing travel destinations, says Iaquinto, pointing to examples like Thailand and Sri Lanka -- two nearby destinations that have maintained successful tourism industries despite long-term political unrest.

However, Hong Kong's image is rooted in its reputation as an open, free and transparent city -- unique selling points that set it apart from some of its neighbors.

"One of the things that makes Hong Kong thrive as a tourism destination is its openness," says Iaquinto.

"You have very favorable visa entry requirements for a lot of different passport holders. It has a major airport, which is a massive hub for global air travel.

"If you look at Shenzhen, right across the border, it is like night and day. It is very different."

Depending on how the law is implemented, Tolkach believes it could also make it challenging for Hong Kong to separate its image from China.

"Hong Kong has a strong brand legacy, and leisure tourists generally are not that political. But if things continue as they are, maybe even Hong Kong, a world-renowned tourist destination, won't be as attractive to international markets," explains Tolkach.

"Increasingly, people will be thinking about Hong Kong as part of China, rather than an autonomous entity. So the destination's image and the other related issues, like trusting the authorities, will be similar.

"If you trust mainland Chinese authorities, then you will travel to Hong Kong without any major concerns. If you don't, you might be worried."