The largest Buddhist temple in the world, built in the 9th century — a stepped pyramid of stacked platforms covered in relief carvings, ringed by bell-shaped stupas at the top, each containing a seated Buddha statue. Best visited at sunrise, both for the light and to get ahead of the day's crowds.
The largest Hindu temple complex in Indonesia, also 9th century, and a genuine architectural contrast to Borobudur's rounded stupas — tall, pointed towers dedicated to Shiva, Vishnu, and Brahma, close enough to combine with Borobudur in the same trip.
Bale Ayu Homestay, in the Kubupenlokan area, booked through Booking.com.