Strait of Malacca is a narrow waterway between the Malay Peninsula and the Indonesian island of Sumatra. It is one of the busiest shipping lanes in the world, connecting the Indian Ocean to the Pacific Ocean. If one travels through the Strait of Malacca, one can come across the following:

1. Singapore: Singapore is a city-state and island country located at the southern end of the Malay Peninsula. It is one of the busiest ports in the world and a major financial hub in Southeast Asia. It is located at the southern entrance of the Strait of Malacca.

2. Malaysia: Malaysia is a country located in Southeast Asia, consisting of two regions separated by the South China Sea. The Malay Peninsula is located to the west of the Strait of Malacca, while the Malaysian state of Sabah is located on the island of Borneo to the east of the strait.

3. Indonesia: Indonesia is an archipelago nation consisting of thousands of islands located to the east of the Strait of Malacca, including the island of Sumatra which the strait borders.

4. Other countries: The Strait of Malacca is an important shipping lane for countries around the world, including China, Japan, South Korea, and Australia. Ships traveling through the strait may be carrying goods such as oil, natural gas, and manufactured goods.

In conclusion, if one travels through the Strait of Malacca, one can come across Singapore, Malaysia, Indonesia, and ships from various countries around the world.