Tumbes is the capital of the Department of the same name in the Region Grau.
 Get in
National buses run along the Panamerican Highway from Lima to Tumbes & some to the frontier with Ecuador. There are kombis along the coast to neighbouring towns, & frequent buses along the Panamerican Highway from Lima to Chimbote, Huaraz, Trujillo, Chiclayo, Cajamarca, Chachapoyas, Piura, Mancora & Tumbes.
 Get around
There are kombis to beach resorts, & colectivos to the frontier. Customs & immigration are several kilometres inside Peru & Ecuador so make sure it is understood that colectivo/kombi/taxis wait while formalities are concluded, & they do not drive off with your belongings on any unexpected diversions. International buses are a safer means of crossing the frontier. Beware of false currency exchange.
[add listing] See
White sand beaches, mangroves, Tumbes River & National Parks like Amotape. The Manglares are a series of swamplike everglade type islands in the shallow water. You can visit a small crocodile zoo, where they are trying to continue to grow the local breed.
[add listing] Do
Observe the beautiful Mosaic's in the town, including a 20' 3-D mosaic of Jesus ascension into heaven. Other ones can be found across the various plazas.
Go for a walk along the Malecon, the walkway along the river.
Get out to the beaches in Aguas Verdes, or Puento Pizarro to see the Manglares, or eat lunch on a small island only reachable by boat.
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[add listing] Eat
Seafood is of course plentiful and affordable. There are many Chifa's, Chinese food with a Peruvian flavor, located on Feijoo street. Many delicious dessert shops are located in the market street.
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[add listing] Sleep
Hotel Costa Del Sol chain, which maintains facilities along the north coast and in Lima, has one in the main plaza in Tumbes. Cheapest room runs about $90, or 270 soles.
Hotel Feijoo is a little more cheaper, but still of good quality, located on convenient Feijoo street with many chinese eateries and shops.
 Stay safe
Tumbes is not a dangerous city at all, but it is indeed a place of many scams run by mixed ecuatorian/peruvian gangs, with the complicity of the frontier police and some bus companies.
In february 2012, 4 argentinians were caught by "taxi drivers" waiting for tourists at the Emtrafesa bus terminal in Tumbes. They were told that Tumbes was a very dangerous city, that they shouldn't get out to the street if they didn't want to get robbed inmediately, and that a taxi to the frontier was the only safe way. The argentinians knew about the CIFA buses, but since the price offered by the taxi drivers was much cheaper, they got in. They were driven to a fake police control outside Tumbes and were forced to pay 100$ each, after which they were driven to the true peruvian border control, in which of course you don't have to pay.
These things happened inside the Emtrafesa bus company. One of the hostess was trying to tell the guys, by mimics, not to believe the "taxi drivers", which means that she and the whole bus company knew about these gangs.
Another possibility is that they don't pretend to be taxi drivers, but rather "agents" of the CIFA bus company that are there to take passengers to the CIFA terminal as a free service, avoiding them the infernal dangers of Tumbes. In that case, they will show you a very sketchy dossier that tries to look like CIFA "official stuff". Don't believe a word.
In February 2009, a tourist asked the bus company that he took from Lima about getting to Quito by bus. They directed him to a man that went with him in a taxi. They claimed that there were problems at the border and that might make it so he would need to pay off police to get across. In the end, they took him to a secluded place by the border and demanded $70 USD.
The advice is: never, by any raison, get into a taxi in Tumbes! Use buses or combis instead.
 Get out
The cheapest way to get to the frontier is by combi. Combis leave when they get full from the corner of Abad Puell with Simón Bolívar, ask anybody at the main street to find them. If you get to the Emtrafesa bus terminal, you're just a corner away from the combis. They will let you off at the peruvian immigration control, where you'll have to get your passport stamped. After that you'll have to make your way to the ecuatorian immigration, which is some kilometers away. If you're around the peruvian border control between 9 and 10 a.m. you'll probably see some transnational buses (Rutas de América, Ormeño, etc.) waiting for their passengers to get their passports stamped: it is not a bad idea to talk to the driver to see if you can join the group until Guayaquil for some dollars. Otherwise, remember: be EXTREMELY careful with taxis around this frontier.
A much easier and safe way, but also much more expensive, is to take a direct bus from Tumbes to Guayaquil, that will wait for you in both immigration offices. Ormeño (Lima to Guayaquil daily & Quito weekly), CIFA (Tumbes to Machala, Guayaquil in Ecuador) & Transportes Loja (Piura to Machala), have international buses to Ecuador. Tepsa runs buses to and from Lima for about $31 or 93 soles.
Be careful not to get scammed by taxi drivers telling you that the Cifa terminal is closed and that you need to take a taxi to the border. The Cifa terminal used to be at 540 Av Tumbes as mentioned in the Lonely Planet guidebook. It has since moved down the street, somewhere in the 900s on Av Tumbes. A taxi driver scammed 20 soles out of me by showing me old information that said the terminal was at 540. The terminal is signed as Cial, but it is also Cifa International.
There are kombis along the coast to neighbouring beach resorts, & national buses run frequently along the Panamerican Highway from the frontier with Ecuador & Tumbes to Mancora, Piura, Chiclayo & Trujillo, (for Huaraz, Cajamarca & Chachapoyas), Chimbote (for Huaraz),& Lima.
The CIFA terminal is located sort of outside town and you will need a moto taxi to get to the center of Tumbes if you want to catch the Cruz Del Sur bus to Lima. The moto taxi should cost you $1. Another option to get to Lima is to book a cheap flight. Peruvian airlines has flights to Lima at 3pm and costs around $95 one way. There is a travel agency next to the Cruz Del Sur terminal that can book a flight at short notice. The airport is located a fair bit (15 mins) away and costs 20 soles or $7 so keep this in mind! The flight will save you about 20 hours on a bus!