We tried looking up directions but couldn't seem to find the entrance, until we realized the entrance is inside the museum of modern art. You pay for the lift up, and I'd recommend paying to take it down as well. We were told we could order a drink up top and get a free lift down, or walk. However when we got up top the bar/restaurant was fancy we felt too out of place to order just a drink, we ended up walking down ourselves. The views are gorgeous from the terrace, very much worth the trip up. Walking down was a tad difficult as there's a path, but if you just continue on it, you do a really long loop. You need to take the side streets down so we kind of had to find our way, but got some other cool photos on the way down and the overall path doesn't take you too far down the river so it wasn't a bad walk back to the hotel.