In many cities, guided city tours are organized by professionals, companies and local organizations for those wanting to explore the city with professional...

National Park System incorporates hundreds of units spread across every state in the union as well as several U.S. territories. National Park System units are...

promotion agency". Some rating systems were operated by organisations representing travel industry vendors. One star in le guide Michelin means a property...

Electrical systems around the world differ in voltage and, less critically, frequency. Plugs and sockets also vary and it might be physically impossible...

travel guide destination page, or travel tips that are so general that they apply to many destinations and don't need to be in each specific travel guide. Full...

metric system, officially known as the International System of Units (French: Système International, or SI). Before the introduction of the metric system, there...

This regional dive guide is intended to provide the already qualified scuba diver with information which will help to plan dives in the waters of the...

U-shaped valleys. The Tuolumne and Merced rivers are the two major river systems in the park, carving canyons that are 3,000 ft (910 m) to 4,000 ft (1,200 m)...

cuisine to be the best in the world. France is the origin of the Guide Michelin rating system, and ties Japan (which has twice the population) for the highest...

subjects such as politics, economic systems, and human rights. Any time you engage in unbecoming conduct, your guide will be blamed for being unable to...

connected by a network of local and regional transit systems. All systems listed in this guide, even those that are shuttles, are open to the general...

is the worlds longest known cave system. It contains 365 miles of underground passages charted on five levels. Guided tours that range from 1.25 to 6 hours...

simple systems that will suit many travellers in the main travel photography article. This article gives suggestions for a more elaborate system based...

Not to be confused with the United States National Park System, which also operates National Monuments, historic sites, etc. There are 63 national parks...

children between 4 and 11 years old. You can borrow a multi-language voice guide system free of charge upon purchasing a ticket, subject to stock availability...

rail transportation systems which are an attraction in their own right, See urban rail adventures. Public transportation is a system of scheduled passenger...

However, this guide deals (primarily) with the urban area of the Ottawa, sometimes called "Old Ottawa". Wikivoyage has separate guides on the suburbs...

passage within the area that you are in. It is best to defer to your guide and if your guide suggests that you pay the tax, accept the recommendation. You can...

the automobile, commercial air travel, and later the interstate highway system, people traveled by train less and less. This led the private rail companies...

service Tibetan guide small group tour by group of local Tibetan guides. Tibet China Tibet, local travel agency in Lhasa Travel China Guide, the largest...