The island nation where a ninth-century Buddhist mountain and a Hindu forest of towers rise from the same Javanese plain, a Dutch trading empire left a canal-cut old town, and Bali turned art and water into devotion. Climb Borobudur and read Prambanan at your own pace, walk the sultan's sacred axis through Yogyakarta, cross the square where a colony became a republic in Jakarta, and follow Ubud's palace-and-temple core to the sea temples of Bali. Some of Southeast Asia's most tour-packaged, bucket-list monuments, and all the better taken on your own schedule, lingering at a relief panel or a mirrored gate as long as you like.