Over the last decade the city has concentrated on developing its tourism, education, financial and cultural sectors to diversify its economy, which until recently relied almost exclusively on oil production.

BBC: Living in: Abu Dhabi

To limit the number of tourists while still enjoying healthy profits, Botswana has focused on developing high-end safari tourism.

FORBES: Can Eco-Tourism Help Underdeveloped Countries?

"My gut tells me that the additional flying we may do on this airplane before it goes to the Air and Space Museum should be focused on developing the very best space tourism vehicle, " Rutan said.

BBC: NEWS | Science/Nature | 'No experiments' for SpaceShipOne

Montenegro, a country whose economy relies heavily on tourism and has been developing its status as a boutique resort for wealthy Russians, has had healthy relations with Russia, thanks in part to its relatively peaceful stance during the Balkan wars, according to Sorana Parvulescu of Control Risks Group, a specialist risk consultancy.

FORBES: Gambling

As part of our efforts to educate consumers about responsible travel choices, TIES, along with several other global institutions and organizations such as the United Nations Environmental Programme, United Nations Foundation, Rainforest Alliance and the United Nations World Tourism Organization, has been working on developing a global process evaluating the effectiveness of certification mechanisms that clearly set apart sustainable from non-sustainable forms of tourism. (See: www.sustainabletourismcriteria.org for more information.).

CNN: The International Ecotourism Society statement

Popova said the Egyptian authorities were developing strategies to strengthen tourism with a focus on diversifying the market.

CNN: Luxor balloon disaster 'blow' for Egyptian tourism