Bangkok: what to see and where to eat
Everything below comes from open data and each row says where it came from. We have not been to any of these places and we do not rank them.
Things to see

Grand Palace
official residence of the King of Thailand since 1782

Bangkok National Museum
museum in Bangkok, Thailand

Lumphini Park
public park in Bangkok

Democracy Monument
monument in Bangkok, Thailand

Mr.Peerapong Prasutr / CC BY-SA 4.0
Erawan Shrine
shrine Dedicated to Brahma in Bangkok

Vimanmek Mansion
royal villa in Bangkok, Thailand

Dusit Palace
Thai royal residence compound

Assumption Cathedral
principal Roman Catholic church of Thailand

Rickbrown9 (talk) / Public domain
Chitralada Royal Villa
royal residence in Bangkok, Thailand

Victory Monument
monument in Bangkok, Thailand

Dusit Zoo
former zoo in Bangkok, Thailand

Bangkok Art and Culture Centre
art museum and cultural center in Bangkok
Places to eat
Eat Me Restaurant
Food: international
No. 43 Italian Bistro
Food: italian
Quest Cafe
Food: coffee shop
Sirocco
Food: mediterranean
Starbucks
Food: coffee shop
Tasca Sabio
Food: spanish, tapas
The Ninth Cafe
Food: italian, thai
เสวยโภชนา
Food: thai
Brasserie 9
Food: french
Cafe De O'Sha
Food: breakfast, thai
Chote Chipr
Food: thai
Coffee Beans by Dao
Food: thai, international
D'Orsay
Food: french
Emperor Yakiniku Buffet
Food: japanese
MK Restaurants
Food: thai
MK Restaurants
Food: thai
PaulyBee's American Burger
Food: burger
Pause II Play
Food: coffee shop
Opening hours and tickets: OpenStreetMap contributors. Each one shows the day a volunteer last wrote it down, so check the official site before you set out.