Old San Juan is a city made for walking: streets of colorful colonial buildings, fortresses by the sea and a whole island within easy reach. Puerto Rico is a US territory, which simplifies logistics for many travellers, and San Juan is its gateway. This guide gathers the US National Park Service information on San Juan National Historic Site, the CDC health page (reviewed 25 August 2026) and the UK FCDO page on entering the US, all consulted on 7 November 2026.
What to see and do
The National Park Service describes San Juan National Historic Site as a World Heritage Site. It includes Castillo San Felipe del Morro and Castillo San Cristobal. According to its website, several countries fought for control of the island for centuries and soldiers lived and worked in the forts; today they are visited for their architecture and defensive engineering, and they connect with episodes such as the 1797 Defense of San Juan. The site's address is 501 Norzagaray Street, San Juan, and its page has sections for basic information, alerts, maps, a calendar and fees: check there for hours and prices because we do not reproduce them without a source. Around the forts, stroll the colonial streets slowly, ideally early or at sunset.
Health before you go
The CDC rates the island Level 1, practice usual precautions. It recommends hepatitis A and B for unvaccinated travellers, up-to-date MMR and considering typhoid depending on the trip. It warns of dengue and zika from mosquitoes: use repellent and covering clothes. After heavy rain it advises avoiding floodwater because of leptospirosis and not swimming in unchlorinated fresh water because of schistosomiasis. For adults with new sexual partners, the CDC recommends talking to a doctor about the mpox vaccine, which is useful for couples with an open lifestyle.
Roads and nights out
Road accidents are a major risk according to the CDC and lighting in parts of the island can be poor, so avoid driving at night. If you go out to eat and drink, plan how to get back beforehand and do not accept drinks from strangers.
Entry for British travellers
The FCDO explains that British citizens need an ESTA or US visa and a passport valid for the whole stay, and that a valid authorisation does not guarantee admission. You may be ineligible for having visited certain countries or Cuba since 12 January 2021. That page does not mention Puerto Rico specifically: confirm with the official US source if your case is special. Other nationalities should ask their own government.
Lifestyle scene
We have not verified any lifestyle venue or event on the island with an official website, so we list none. When an official source exists we will add it. Meanwhile, if you want an adults-only stay, ask for its rules in writing.
Planning your trip
Two days cover the old town and the forts; with four or five you can alternate city and beach. Avoid the midday sun, wear comfortable shoes for the cobbled streets, take insurance with medical cover and keep a digital copy of your passport. Also read our Puerto Rico travel guide for couples.
Frequently asked questions
Do I need a passport? It depends on your nationality; check the official US source. Are there verified swinger clubs in San Juan? We list none. Which vaccines are recommended? The CDC's: hepatitis A and B, MMR and, depending on the case, typhoid and mpox; talk to your doctor.
Etiquette and consent for couples
Travelling with a lifestyle mindset does not change the basic rules of coexistence: what may be a private agreement at home moves within local rules abroad that you may not know. Talk with your partner before leaving about limits, pause words and what to do if either of you feels uncomfortable. Respect the privacy of other guests and staff, do not photograph strangers and treat a "no" as final, with no negotiation. In public spaces such as beaches, streets and transport, keep your behaviour discreet: public indecency laws exist and police enforce them. If a property advertises itself as adults-only, that does not mean it accepts lifestyle activity; ask about its rules before booking and keep the answer in writing.
Quick checklist before booking
Check that your passport meets the validity rules for your nationality, read your government's travel advice and the CDC or another health authority's page, take insurance with medical and repatriation cover, and note your consulate's phone number. Download offline maps, keep digital copies of documents somewhere safe, tell your bank you are travelling and always carry some cash for surprises. Avoid sharing your live location and your lodging's name on public social media. If anything you read here changes, the official sources cited above take precedence over any guide, including this one; that is why we link them and give the date we consulted them. We will review this page again when the sources are updated.
