Though most of the inspired travel ideas I've written about so far have been because of Mother Nature, the Kuha Karuhas Pavilion inside Phraya Nakhon cave of Thailand's Khao Sam Roi Yot National Park is definitely man-made. But, that doesn't make it any less striking. Established in 1966, Khao Sam Roi Yot was Thailand's first coastal national park, the Pavilion is just one of the highlights in the vast park.
Resting on a hill inside the cave, the building sits beneath a naturally-made skylight – the cave's roof collapsed long ago. While it looks like there was no rhyme or reason for it's placement and existence, the small temple was built for the visit of King Chulalongkorn, back in the 1800s. Since then, other kings and countless tourists have trekked into the cave. While there, don't be surprised if you come across rare species of birds and animals like the mainland serow (a goat antelope) or a dusky leaf monkey. Because the park is along the coast and further south, you can pay a visit much of the year without dealing with unbearable heat. November through June will be enjoyable with less rain and comfortable temperatures.