A most wonderful city, the Pearl of the Danube! Buda and Pest, situated on the two banks, are great, one being mountainous with castles and old mansions, and the other being low with parks, restaurants and nightlife. It is a true spa-city, one of the main attractions being the thermal baths. Make sure you visit the Szecsenyi Baths: old beautiful building (newly renovated), healing water with lots of minerals and micro-elements and fountains/waves/jakuzzi for fun! Can be visited around the year as the water is warm/hot, so you won't freeze even in winter in the open-air pools. Bliss!
Gellert Baths (in Gellert hotel): probably the most expensive baths located in a fancy hotel on Buda side with a pool on the roof. It has separate sections for men and women for those who consider it fun :)
Underground: the yellow line ("Foldalatti") is over 100 y.o. and is the oldest on the continent! It is 11 stops long and runs through the centre of the city on Pest side. There are 2 more longer lines (looking exactly like trains in Moscow!), and a 4th is being constructed now.
Hungarian cuisine is famous for gulyas, paprika and halaszle (fish soup), which I recommend trying in small family-owned restaurants you will find all over the place.
And after a dinner, take a walk in the night city: take Szecsenyi Chain Bridge to cross the Danube from Pest to Buda or back And as you are walking at night, you can see many lights glittering in the sky - they are in Buda hills calling you up to enjoy the panorama of the night city. Go up the Gellert hill and enjoy the purple -pink colors of the city when it is waking up in the morning...

I spent 3 years there and keep coming back. I love the city and hope you will enjoy it, too.

In Budapest don't miss: The night boat tour served up in a glass enclosed boat and a glass of champagne, its perfect for an after dinner overview of the beautiful skyline of Budapest! http://www.seebudapest.hu/

Go to the top of Pest hill (near the castle) to have an amazing view of the city, expecially at night. And if you go in august don't miss the Sziget Festival, a one week no-stop party on the sziget island, north of the city

Budapest is wonderful place. If you are looking for peaceful spots - got to Margaret's Sziget (read: Siget = Island), worth seeing is Japanese and Rose Garden The most famous Street in Budapest is Vaci Utca - you can find there masterpieces of human originality and individuality, in the evenings - the street is bursting with life - be careful of being invited to clubs by their doormen - looking at least devilishly ;) You absolutely must see this carnival of people's variety (DragQueens, Lesbians, Gays, street actors) If you are looking for rest - go to Szechenyi Furdo (Baths)!! Amazing hot water pools in 19th century yard... magnificient!! Budapest, however, in my opinion is very dirty and unpleasant at Underground Stations - but you cannot miss going the oldest in Europe Yellow Line Metro!

One of the absolute most beautiful cities I've ever visited. I fell in love with it the moment I got there - recommending the Pest side, it's the oldest, with most charm and best deals (you can buy the most delicious yoghurt icecream for nothing!)

Budapest my lovely city. My big love...!!!its sooo beautiful, amazing, mysterious, and lovely city...I have no expressions do describe that city!!!i love it!!!

A gorgeous city, reminiscent of Paris and other beauties, especially at night. Take your time and explore the mountains and be prepared for a sight like no other. Just gorgeous.

If you visite the Buda hill, do it at night. It's an amazing view over the Pest side of the city! You can also make a boat trip on the Danube.

Great city with a mass of historic value. The chain bridge is nice to see and also the island in the middle of the
Danube is worth a visit. Wonderfull parliament. Budapest also has a great plubic transportation network!

Shopping, history, nature, health/wealth - Budapest has it all. Stay on the most cheap and hip side of the river, Pest. Take at least 3 whole days here. The city is well known for its health care and spa resorts.