The 99 Peaks Trail (aka Jiujiufeng Forest Trail or 九十九峰) in Caotun Township of Nantou County is one of the most unique and beautiful places in Taiwan. It features extremely steep grassy hills that look like they are from a cartoon. This is due to the easily eroding sediment that they are made out of. Taiwan's torrential rains and earthquakes have sped up the erosion on these hills, making them especially steep and pointy, and creating what looks like 99 peaks on the horizon. From the trail one clearly see the jagged 99 peaks as well as beautiful views of Caotun and Nantou.

Background:
​The 99 Peaks are built on the same sediment as Huoyanshan, with iron rich soil that was deposited and lifted up due to tectonic forces.
Discoloration due to laterization (leaching and oxidation due to heavy rain) of minerals in the sediment has made the rocks near the top of the mountain here orange-red.
Like Tianliao Moon World (田寮月世界) and Liji Badlands （利吉惡地）, 99 Peaks is considered a badland due to fast erosion.
99 Peaks, Huoyanshan (火炎山), and Shibaluohan Mountain (十八羅漢山) make up the three "Huoyanshan formations" in Taiwan. 
The slopes here are very steep, and average from 60-80 degrees, making them impossible to cultivate. The entire mountain area is like a bunch of mini slot canyons.
At it's highest point, the 99 peaks are 779 meters above sea level, but were only 777 meters above sea level before the 921 earthquake. 
After the 921 earthquake, much of the soil on the mountain eroded away due to shaking, and the hills were left bare. Shortly after, the area was declared a nature reserve. 21 years after the earthquake, the hills are now covered in grass and shrubs. 
The trail doesn't go to the very top of the peaks, and if you venture further be careful because the cliffs are very steep on either side and erosion could happen at any time. 
As of March 2020, Nantou County has purchased the land of 99 Peaks for 100 million NT, in hopes of cultivating it for tourism, such as hot air balloon rides. Let's hope it becomes a major tourist destination!

Hours:
24/7

Price:
Free

Length:
1 KM one way
About 1 hour total
About 200 meters of elevation gain.

Difficulty:
Easy

How to get there:
By Car: Take National Freeway 6 toward Puli and get off at the east Caotun interchange. Then drive east on provincial highway 14 until you reach Jianxing Rad intersection on the other side of the river. Turn left and keep going until you reach the trail head. 
By Scooter: Ride east on provincial highway 14 until you reach Jianxing Rad intersection on the other side of the river. Turn left and keep going until you reach the trail head. 
By Bus: Take bus 6268A east out of Caotun and get off at Pinglin Station. From there it is about a 20 minute walk to the trailhead. 

Map:
Please see below:

Elephant Trunk Rock is a rock shaped like its name in the Shenao area of Ruifang District, New Taipei City. There are also many interesting rock formations in the area. It is one of the most recognizable rock formations on the north coast and a popular location for, kayakers, snorkelers, and instagrammers. 

Background:
The sandstone and sedimentary that forms the Elephant Rock formation was created between 10 and 20 million years ago, and was pushed out of the sea along with northern Taiwan thousands of years ago. 
The Elephant's head was formed by easily eroding sandstone, with the area under the trunk being eroded away by the sea and waves. 
Elephant Rock is so named because it looks like an elephant.
The area around Elephant Rock was a protected military base until the year 2000, after which civilians were allowed to freely visit.
Kayaking and Snorkeling are also popular activities near the Elephant Rock.

Hours:
24/7

Price:
Free

How to get there:
By Car/Scooter: Drive to Keelung, then from downtown take provincial highway 2 east about 10 KM until you reach the Shenziao harbor, and there is some paid parking if you drive to the very end, which will put you closest to Elephant Trunk Rock.
​By Train/Bus: Take the TRA to Badouzi (八斗子） station, then walk about 1 KM east until you reach the elephant rock on the coast. 

Map:
Please see below:

Yehliu is perhaps the most famous geological park in Taiwan, with its most famous landmark being the Queen's Head rock. These rock formations have been forming for thousands of years through erosion of soft sandstone due to wind and water. Hurry and see these formations soon before they are gone forever!

Background:
The sandstone that forms the Yehliu formation was created between 10 and 20 million years ago, and was pushed out of the sea along with northern Taiwan thousands of years ago. 
The Queen's head is formed by two layers of sandstone, one soft fast eroding layer on bottom and a harder layer on top. This kind of sandstone formation can be seen around the world and is known as a hoodoo. The Queen's head was named after Queen Elizabeth I, because it is thought to look like her. 
The head is eroding .2 to .5 CM per year and is expected to fall at any time!
The name Yehliu comes from the Spanish name for the area "Putno Diablos" which was then also used by the Dutch, and transliterated by the Chinese settlers in the area as "Yehliu" in Chinese. 

Yehliu Ocean world is the largest aquarium in northern Taiwan and has one of the few outdoor sea life amphitheaters in Taiwan. The facility features an indoor aquarium and outdoor show that is geared toward children.  

Hours:
Yehliu Geopark: 8 AM to 5 PM in winter (tickets not sold after 4:30)
8 AM to 6 PM in summer (tickets not sold after 5:30)
Yehliu Ocean World: 9 AM to 5 PM

Price:
Yehliu Geopark: 80 NT per person.
Yehliu Ocean World: 330 NT per person (children are sometimes free)
​
Can I touch the rocks?
Don't you dare touch the rocks! 

How to get there:
​By Bus: There are inter-city buses that leave hourly from Taipei Main Station and Taipei City Hall to Yehliu. 
By Car/Scooter: Take Provincial highway 2 west out of Keelung, and keep going until you reach Wanli. The turnoff to  Yehliu comes right after Wanli beach. 

Map:
Please see below: