我需要签证吗？
ESTA (Electronic System for Travel Authorization) required for Visa Waiver Program countries (UK, Australia, most EU, Japan, etc.) for stays up to 90 days. Canadians enter visa-free. Many nationalities require a B1/B2 tourist visa.
ESTA: apply at esta.cbp.dhs.gov at least 72 hours before travel. Tourist visa (B1/B2): apply at US embassy with DS-160 form, interview, and supporting documents.
ESTA: usually approved within minutes to 72 hours. B1/B2 visa: weeks to months depending on embassy wait times.
ESTA: $21 USD. B1/B2 visa: $185 USD application fee.
- ESTA is valid for 2 years and multiple entries.
- US visa interviews can have months-long wait times — apply very early.
- CBP officers at immigration can be intimidating — answer questions honestly and briefly.
- Passport must be valid for 6 months beyond your stay.
签证要求因国籍而异并经常变化。旅行前请与你所在国家的大使馆或目的地官方移民机构核实。
Content on Ouoba is provided for general informational purposes only and does not constitute legal, immigration, visa, insurance, tax, medical, financial, safety, or other professional advice. Users should consult official authorities, qualified professionals, or service providers before making important travel, financial, legal, or health-related decisions.
目的地安全吗？
Tourist areas in major cities are generally safe. Gun violence is a reality — mass shootings occur. Some urban neighborhoods have high crime. National parks and rural tourist areas are very safe. Healthcare is extremely expensive without insurance.
- Ticket scalpers outside major attractions.
- Fake homeless people with elaborate stories — common in NYC and LA.
- Rental car damage charges — photograph everything.
- Timeshare presentations disguised as free activities.
- Healthcare is excellent but EXTREMELY expensive. Travel insurance is absolutely essential — a hospital visit can cost thousands.
- Pharmacies (CVS, Walgreens) are everywhere.
- Tap water is safe in most areas.
- Routine vaccines only. No special requirements.
Tap water is safe in most cities. Some rural areas and Flint, Michigan have had issues — check locally.
Gun violence is a unique risk. Healthcare costs can be devastating without insurance. Driving distances are massive — the US is huge. Natural disasters vary by region (hurricanes, tornadoes, earthquakes, wildfires).
安全信息基于公开的旅行建议。请咨询你政府的旅行建议服务以获取最新指导。
Content on Ouoba is provided for general informational purposes only and does not constitute legal, immigration, visa, insurance, tax, medical, financial, safety, or other professional advice. Users should consult official authorities, qualified professionals, or service providers before making important travel, financial, legal, or health-related decisions.
当地文化有哪些需要了解的？
- Road trip — the US is built for driving. Route 66, Pacific Coast Highway, Blue Ridge Parkway.
- Visit national parks — Yellowstone, Grand Canyon, Yosemite, Zion are world-class.
- Try regional food: BBQ in Texas, seafood in Maine, Tex-Mex, deep-dish pizza in Chicago.
- Don't forget to tip — 18-20% at restaurants is expected, not optional.
- Don't underestimate distances — LA to San Francisco is 6 hours driving.
- Don't jaywalk in some cities — you can get fined.
Tipping is MANDATORY in practice. 18-20% at restaurants. $1-2 per drink at bars. 15-20% for taxis. $2-5 per night for hotel housekeeping. Not tipping is considered very rude.
Very casual. Americans dress down more than most countries. Jeans and sneakers are acceptable almost everywhere.
Christian majority but extremely diverse. Every religion represented. Very secular in daily life in most cities. Bible Belt (South) is more conservative.
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