In my books, Apayao is a top adventure destination. It is so raw that very few travelers venture into this northermost Cordillera province. Admittedly not an easy destination. But its remoteness adds to the adventure.
Apayao is bounded on the north and on the east by Cagayan. That is why it was, for a time, part of Cagayan. To its west is Ilocos and Abra. To the south is the province of Kalinga which was, also for a time, part of the Kalinga-Apayao province.
One would think that the asy access would be from Ilocos. There is none. Or from Abra. Think again. Apayao is accessed via Cagayan Valley, from the toen of Pamplona, in particular.
Thus, the adventurous visitor will have to travel all the way to Pagudpud in Ilocos Norte, cross Patapat, and drive on to the Cagayan towns of Sta Praxedes, Claveria, Sanchez Mira, and Pamplona. The junction in Pamplona leads to the first and most progressive town of Luna, Apayao.
One must make arrangements for accommodations before traveling to Apayao as there are not many. Again, that is characteristic of places where one goes on an adventure.
PLACES TO SEE
Marag Valley is a haven for adventure travelers. Proceed to the Tourism Center in Marag Valley which is easy to find because it is within the barangay’s basketball court. Make arrangements to tour the Dupag Rock Formations, the Hanging Bridge, and the Manacota Underground River.
Dupag Rock Formation
If you are extremely fit and athletic, take the hard route. As for me, I felt that the easy route was actually hard. Wear shoes or sandals with great grip and traction as the rocks could be slippery. Do not go without a guide, as you will need him/them as human ladders.
The rock formations are accessed after crossing a shallow river.
Hanging Bridge
Not quite an adventure, but definitely a must see, even just for photography. A hut on the foot of the bridge serves as Visitors Center. List down, and make a donation. You can also arrange a picnic on a floating hut on the river.
Manacota Underground River
This is, to me, the better one of the two underground rivers in Apayao. Hike for 1.5 kilometers, crossing the same river 7x moving from one side of the river to the other, because in some parts the other end would be rocks and boulders where you can not hike. One river crossing would be nearly waist deep. Make sure you wear quick-dry shirts and shorts
Second river crossing was waist deep. And 5 more river crossings after this.
The reward from the long hike is the beautiful mouth of the river. Going in is even more pleasurable, as the narrow boat navigates in between rocks and boulders INSIDE THE CAVE. No this is not like Puerto Princesa.
The end of the underground river cruise is a beautiful spot that looks like paradise. You may want to swim there, or just stay to immerse in the beauty of nature.
Lussok Underground River
This is easier to access. We parked our 4×4 right into the grounds where the tourism desk is. There is also a toilet for visitors here. Access is easier as there is no hike, but the roadworks have not been completed so we drove our 4X4 onto a shallow river and muddy roads. 
The cruise into the cave is steadier, as the boat has a balancer (bamboo poles on its side, but not really outriggers. It was so steady the guide stood on the other end of the boat. 
Start point for spelunking
Pudtol Ruins
This is found behind the Municipal Hall of Pudtol, within the school compund, right beside the church. This was an old Spanisg church built with the intention of Christianizing the indigenous Isnegs. Another church ruins can be found in Mataguisi, a different barangay in Pudtol.
Where to Stay
Star Jewel
Hands down, it will have to be Star Jewel. The proprietor, Josefina, is a retired nurse. Basic accommodations, but nice and clean, and airconditioned. meals can be arranged. The dining room is folksy, and there is a videoke for free use of guests.
Another Option
Big groups may want to stay at the cottages operated by the Tourism Office. Each cottage can have as many as 10pax for P2,500 a night. There are many such cottages, each one with its own dining room and a living area.
Contact the Toursim office thru their facebook page
https://www.facebook.com/apayaotourismoffice/
LAKWATSA 