Border crossings refer to the points where individuals or goods move from one country to another. These crossings can occur at designated locations such as airports, seaports, and land borders. Travelers typically need to present identification and may go through customs and immigration checks to ensure compliance with each country's laws. The process of crossing a border can vary depending on the countries involved and the purpose of the crossing. For example, tourists may require a visa, while merchants transporting goods must declare their items. Border crossings are essential for international trade, travel, and cultural exchange.