The Mahanakhon SkyWalk is a glass-floored observation platform located at the top of Thailand's tallest skyscraper, the uniquely shaped King Power Mahanakhon. It offers visitors a vertigo-inducing bird's-eye view of downtown Bangkok.
SEA LIFE Bangkok Ocean World boasts the biggest aquarium in South East Asia (unless you count the Pacific!). It's easy to reach by public transport from Bangkok, just take the BTS to Siam Station, or one of several buses heading in the direction.
Baiyoke Tower II is an 88-story skyscraper hotel in Bangkok, Thailand. It's one of the tallest buildings in Bangkok, and the 7th tallest hotel in the world. Its panoramic observation deck is a major tourist attraction, providing dizzying views of Bangkok's high-rise skyline.