Union City

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Alcatraz Island
No. 1 of Best Things to Do in San Francisco

Alcatraz Island

7.6
4.6/5
572 reviews

Alcatraz Island stands isolated in San Francisco Bay, facing Fisherman's Wharf across the water. To reach the island, visitors must take a ferry from nearby Pier 33. In 1775, Spanish explorers mapping the bay named it "Isla de los Alcatraces" (Island of the Pelicans) due to the abundance of seabirds. However, this small island later became world-famous for its "devilish" reputation: from 1850, it first served as a military fortress guarding the bay entrance, then became a military prison. From 1934 to 1963, it operated as a high-security federal penitentiary housing over a thousand inmates including Al Capone. No escape attempts were ever confirmed successful. The island served as a filming location for "The Rock," and its English name inspired "Azkaban" in Harry Potter. From 1969 to 1971, a 19-month Native American occupation made it an important landmark in the American civil rights movement. Now the entire island is part of the Golden Gate National Recreation Area, where abandoned prison cells, old lighthouses, and weathered barracks still retain their original layout. The prison cells along the main corridor, "Broadway," are open to visitors, with permanent exhibitions recounting the island's past. Put on headphones, and the audio guide plays firsthand accounts from former guards and inmates. Between the cliffs and shrubs, seabirds like western gulls, cormorants, and black-crowned night herons nest and thrive. The blend of profound history and bay wildlife makes it one of San Francisco's most distinctive destinations.

San Francisco · 42.3 km from Union City

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Featured Food & drink in Union City

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Featured Day tours in Union City

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From San Francisco: Classic Highway 1 Tour | Stanford, Carmel & Big Sur
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5.0/5
· 1 review
Duration: 11.1 hrs
English
Free cancellation
FromSGD 191.98
San Francisco Sonoma Plaza + Napa Valley Winery Tasting Day Tour Including Wine Tasting
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5.0/5
· 4 reviews· 24 booked
Duration: 4.5 hrs
English
Free cancellation
FromSGD 199.50
San Francisco 1-day tour [Golden Gate Bridge/Lombard Street/Fisherman's Wharf]
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5.0/5
· 1 review
Duration: 6.4 hrs
English
Free cancellation
FromSGD 168.15
San Francisco's Full city 1 Day Hop on Hop off Bus tour
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3.4/5
· 133 reviews
Duration: 8 hrs
English
Free cancellation
Book now for today
FromSGD 57.72
Golden Gate Bridge Guided E-Bike Tour with Lunch at Local Hotspot
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5.0/5
· 11 reviews
English
Free cancellation
Book now for today
FromSGD 153.90
BEST of Monterey Peninsula & Carmel-by-the-Sea Small Group Tour
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FromSGD 151.34

Featured Outdoor & sports in Union City

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San Francisco Day Tour | Redwood Forest Steam Train, Santa Cruz Wharf & Rainbow Houses
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FromSGD 130.55
1-day tour of CA-1, 17 Mile Dr and Carmel Beach in San Francisco
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Duration: 10 hrs
English
Free cancellation
Book now for tomorrow
FromSGD 191.98
Redwood Forest Steam Train and Santa Cruz Coast Day Tour
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Duration: 6 hrs
English
Free cancellation
FromSGD 293.12
1-day tour to Monterey Peninsula in small group
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FromSGD 183.45
Golden Gate Bridge Bike Rentals - Very Close To The Bridge!
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4.1/5
· 15 reviews
Duration: 2–8 hrs
Free cancellation
Book now for today
FromSGD 57.72

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Union City Today's weatherMostly cloudy 10-23℃
Union City weather for the next 2 days11/11: 11-23℃, 11/12: 15-23℃

Free things to do in Union City

What travelers say about Union City

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YoYo_1I8Q7O5OMay 1, 2026
5.0
Silicon Valley doesn't really feel like a tourist attraction. I stood in front of Apple's giant ring for a while; the security guard was polite but wouldn't let me in. Google's colorful bicycles were there, but passersby were too busy looking at their phones. In the roadside cafes, people were frowning so deeply at their computers they could trap a mosquito. Driving around, all you see are low-rise office buildings, much like a typical industrial area. But sitting on a park bench near Stanford, watching kids fly kites, was much more comfortable than any of those tech parks.

Silicon Valley

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118***74August 25, 2023
5.0
The campus is open and has no walls. There is a large lawn in the middle that is sunken and below the ground. There are parking spaces around it. It is very comfortable to lie on the grass. There are many attractions on the entire campus, and this is just one of them.

Stanford University

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TodemmyDecember 17, 2019
5.0
The scenery in this area of ​​Central Park is also very romantic! It is worth a visit. The style is what you can see in all big cities. You can see that the infrastructure is very complete. You can relax and take a walk. There are special areas. It is worth seeing!

Central Park

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雨田August 30, 2017
5.0
The colorful Google headquarters is located in Mountain View. An old classmate who works at Google enthusiastically took us inside to visit and introduced us. In the beautiful environment surrounded by bright sunshine and green trees, Google employees can be seen sitting on the ground at work, discussing problems in groups of three or two, or operating computers alone. It is rare to be able to engage in high-tech creative work in such a relaxing and comfortable environment!

Googleplex

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_TI***l0April 6, 2026
5.0
Filoli Garden House was absolutely a bang for a buck! It was so stunning with various kinds of flower during peak blooming season of springtime. Historic House was amazing as well with ethereal interior design, especially the gorgeous arts of floral arrangement in different vases.

Filoli Historic House & Garden

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CHU66February 2, 2025
5.0
It is a large natural regional park located in Fremont, California, with a rich ecological environment and outdoor activities. It is suitable for hiking, picnicking and bird watching. It is also a paradise for nature lovers.

Coyote Hills Regional Park

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ryne.srjMay 12, 2025
4.0
a lot of sea lions! a must see place in san francisco! should get a sea lion plushie as well as a gift!

Fisherman's Wharf

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TxnxNovember 10, 2026
4.0
It was great. Very suitable visiting as a solo. Lots of information about the history were provided. Time spent was about 2.5 hours reading every thing. It was cold and windy there even though it was late summer so best to wear a jacket.

Alcatraz Island

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130***95April 27, 2026
5.0
It's definitely worth a visit; many of the artworks are quite impressive. There are so many museums in the US! This museum isn't far from Union Square; the service is also good, and the staff are very welcoming.

San Francisco Museum of Modern Art

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coo***anJanuary 7, 2020
5.0
[Scenery] The scenery of Hayward Japanese Gardens is really very Asian style, quiet and peaceful, very interesting! [Fun] You can see the flowers and plants, which is very interesting!

Hayward Japanese Gardens

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Frequently asked questions

What are the must-do things in Union City?

Don't miss these attractions in Union City: Silicon Valley, Stanford University, and Central Park. If you like Food & drink, try 1-day tour to Sonoma and Napa Valley wine country from San Francisco. If you enjoy Day tours, try From San Francisco: Classic Highway 1 Tour | Stanford, Carmel & Big Sur.

You can give 1-day tour to Sonoma and Napa Valley wine country from San Francisco and Hard Rock Cafe San Francisco Dining Experience a try. Before you go, please check their opening hours and menus online. Reservations are recommended, especially during peak hours.

When choosing a tour, start with how much time you have and the kind of experience you're looking for. Trending options right now include From San Francisco: Classic Highway 1 Tour | Stanford, Carmel & Big Sur, San Francisco Sonoma Plaza + Napa Valley Winery Tasting Day Tour Including Wine Tasting, and San Francisco 1-day tour [Golden Gate Bridge/Lombard Street/Fisherman's Wharf]. Check the real-time availability and itinerary before you book.

As of November 11, 2026, the reference price for day tours and activities in Union City is around SGD 57.72 – SGD 199.5. Rates vary by duration, group size, transportation, tickets, meals, and any special admission requirements. Before you book, please confirm the billing currency and whether the price is quoted per person or per group.

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Change and cancellation policies vary by attractions and tours. Please check the product details page for more information.

Ticket prices may vary between weekdays and weekends, as well as during peak and off-peak seasons. When booking with Trip.com, you can also use Trip Coins to get extra savings. For more tips on booking discounted tickets, please visit Trip.com for the latest information.