Len Leng, Kocha Olarn, Helen Regan and Jonny Hallam, CNN Phnom Penh, Cambodia / Bangkok, Thailand (CNN) — Cambodia and Thailand exchanged fire across their disputed border for a fourth day on Sunday, ...

Armed clashes have broken out between Thailand and Cambodia in long-disputed border areas, rapidly escalating months-long tensions.

This video was filmed in different areas of Costa Rica and shows waterfalls and rivers in 4K with background music.

This video was filmed in coastal areas of Costa Rica. It includes 4K footage of ocean and beach scenes with background music.