Thailand

Natural Landmarks

Cliffs of Koh Phi Phi Le island – Krabi province, South
Doi Inthanon Mountain
Erawan Waterfall
James Bond Island (Ko Tapu)
Naga fireballs of Mekong – Nong Khai
Namtok Mae Ya Waterfall – Chiang Mai province, North
Namtok Pha Charoen Waterfall – Tak province, West
Saphan Hin – Tak province, West
Thi Lo Su Falls (Namtok Teelorsu, Thilawsu, Umphang Thee Lor Sue) – Tak province, West

Man made Landmarks

Ancient Phimai (Vimaya, Vimayapura) – Nakhon Ratchasima province, Northeast 
Ayutthaya Buddha Head
Ayutthaya Old City – Ayutthaya province, Central
Bridge Over the River Kwai
Chedi Wihan Samphutthe temple
Chiang Saen – Chiang Rai province, North
Kampheng Phet (Kamphaeng Phet) – Sukhothai province, Central
Maekhlong Railway Market
Phanom Rung temple – Buri Ram province, Northeast
Prasat Hin Phimai
Sanctuary of Truth in Pattaya
Sanphet Prasat Palace
Si Satchanalai – Sukhothai province, Central
Sukhothai Historical Park
Wat Muang
Wat Phra Si Rattana Mahathat – Phitsanulok province, Central
Wat Rong Khun – Chiang Rai province, North
White Temple

Best Landmarks in Bangkok

Chao Phraya River
Damnoen Saduak Floating Market
Grand Palace
Marble Temple
Rama VIII Bridge
State Tower
Temple of the Emerald Buddha
Temple of the Reclining Buddha 
Wat Benchamabophit – Bangkok, Central

Wat Pho