Osulloc Tea Museum.

Opened by cosmetics giant Amorepacific in 2001, Korea’s first tea museum sits right alongside the rolling Seogwang tea plantation on Jeju Island. Rather than a stuffy gallery of artifacts, the space functions as a seamless indoor-outdoor destination where visitors can trace Korean tea history, watch tea leaves being roasted, and walk directly into the manicured rows of green tea plants. A massive 2020 expansion added sleek, minimalist glass pavilions that house an eco-friendly rest area and a highly popular cafe. This is the spot to try rich matcha soft-serve, green tea roll cakes, and fresh brews made from leaves grown on the island's volcanic soil. Don't miss the observatory for panoramic views of the surrounding estate, which contrasts beautifully with Jeju's black basalt stone.