On the bank of the Chanthaburi River is the Church of the Immaculate Conception. The French-style Catholic cathedral is the largest cathedral in the country and dates from the late 1800s.
The Gem Quarter attracts gem traders from all over the world to the provincial city. During weekends, a rainbow array of gemstones from Myanmar, Cambodia and the rich mines of Chanthaburi are traded at street stalls.
Some of Thailand's richest rainforests are contained within Namtok (waterfall) Phliu National Park , a haven for wildlife, located on Sabap Mountain. The park contains a number of waterfalls, but the most spectacular is the Phliu Waterfall. Facing the waterfall are 2 chedis built by King Rama V in honor of one of his queens who drowned in Bang Pa-in Palace in 1876.
Noen Wong Fort is part of the original city wall built during mid-1800s to defend against invading Vietnamese forces. Still evident are old cannon fortresses. A Maritime Museum in the compound behind the fort walls houses archeological treasures, mostly medieval pottery, recovered from sunken merchant vessels in the Gulf of Thailand.
Dolphin shows are staged daily at the Oasis Sea World , located nearby the Laem Sing Cape. The center also breeds and preserves dolphins from local waters.
Laem Sing Cape is mainly a fishing community with beachside restaurants. Within the area are 2 historical structures. The Khuk Khi Kai (Chicken Defecate Prison) was a jail built by the French in 1893 to house Thai prisoners, upon whom chickens defecated on. The Tuk Daeng (Red Building) was original the headquarters of the Thai fort but was transformed into a residence by the French officers.
The natural combination of beach, cape, mountain, and bay at Laem Sadet, Khung Wiman and Chao Lao Beach offers a panoramic and relaxing environment for swimming and other water activities.