I had business in San Francisco and stayed out of my other things to do. Here are some pics:
That's Coit Tower in distance. On the other pic the Alcatraz Island is clearly visible in front of Golden Gate Bridge in San Francisco Bay.
In the business center, the Market Street looks like this from 6th floor:
And while having drinks in the 39th floor of San Francisco Marriott Marquis, the night view is something like this:
For those planning to travel to US, my recommendation is to get local SIM-card. The EU-limit of 62,- € will be reached pretty much immediately. The data roaming prices are insane. 1,- € / 50 KiB or similar. The SIMs sold at the airport cost three times more than the going price at the street is. I just went to a local T-Mobile store and got a pay-as-you-go card. Fee for the SIM was $15 and 1 GiB of LTE transfer was $10, making the total $25. You can charge more gigabytes to the account if you run out.