You can reach Culebra via daily ferry from Fajardo or on week days from Vieques. Average price is about $2.50 for a (very bumpy) ferry ride and it takes about one to one and a half hours from Fajardo. However, reaching Fajardo from San Juan by taxi costs $80-100. There is also a new high speed ferry option from San Juan on Thursdays through Sundays, which costs about $45 a head. Crowds can be thick for both ferries, so get there early, especially on weekend mornings. You can also reach Culebra via daily airplane service from San Juan, Fajardo, Vieques or nearby Saint Thomas. These are small 4-8 passenger planes. Average plane ride is about $45-$80 and takes about 20 to 45 minutes. Reservations strongly recommended.
There are several native-run taxi services on the island, ferrying tourists around town, to the airport, and to Flamenco Beach. They charge a very reasonable $2 per person. These taxis are essentially the only way to get around besides on foot.
Flamenco Beach is quite outstanding, and unlike the other beaches in Vieques and Culebra, popular enough to attract a real crowd. The beach is in a calm cove and stretches into a cirle of nearly a mile in length, and a few rusted-out U.S. Army tanks silently watch over the beach. The water is clear, shallow, and calm, and the waves are small. Reefs exist on each side of the beach and are very easy to access directly off the beach if you have snorkeling equipment with you, and other snorkeling beaches can be accessible by taking the (safe) path through the old army minefield. The reefs are not world class but they are interesting enough for amateur snorkelers. Facilities at the beach are few. Showers run sporadically and there are flush toilets, but no lights. Fresh water is freely available. Bring a cooler with plenty of snacks and drinks, plus towels or beach chairs if you can. Campers should be warned that it gets surprisingly windy and chilly at night. Bug spray is recommended. Bring a tent and sleeping bags, and, if you have one, bring a hammock to string between two trees for a night under the stars.
There are several small restaurants on the island as well as small hotels which have restaurants. Reservations are recommended if you plan on going to a hotel restaurant.
Mamacitas Hotel and Restaurant (besides offering accommodation) has a restaurant on the canal. Breakfast, lunch and dinner are all great menus, although a little bit pricier than other local fare.
Dinghy Dock has a wonderful atmosphere and a good ment with a regular crowd of ex-pats. It's name is literal as people dock their dinghys and hop up for a table. If you head down when the chef gets in at about four thirty, you can help him feed the Tarpon fish that swim around the dock waiting for table scraps.
"Superette Mayra" is a small jam-packed grocery store that has it all, including sundries such as cooking pots, supplies for diabetics, reading glasses, cheap coffee machines, beach toys, plastic flower pots, sewing needles. Closed Sundays and during siesta time 1-3 pm.
Several food vendors hawk their wares daily at the entrance to Flamenco Beach. The grilled meat-on-a-stick is both delicious and cheap. Lots of bottled water and other cold drinks from vendors with ice chests
Mamacita's bar and restaurant in the heart of the town is popular but quite pricey. El Eden's liquor store and sandwich shop has a wide selection of local and foreign alcohols for reasonable prices. The Chinese restaurant in town sells some liquor, but the proprietor speaks no English and only some Spanish, so good luck there.
There are half a dozen or so hotels/resorts on Culebra. The term "resort" is a bit misleading as the average facility will be 2-3 stars at best. This is a small island after all! Some of the older hotels are barely a one star. Service is typical laid back (i.e., slow) island style. There are also plenty of houses and villas for rent on the island. Camping is permitted for up to four months at a time on the beautiful government-run Flamenco Beach, just a few miles outside of the main town.