Rachel Dare

Annabeth strode off the ship, stepping nervously onto the gorund. Annabeth didn't know if Percy had remembered her atau not. What if he met someone else, after all it has been 8 months, she thought worried. She felt Jason stand beside her he was tapping his foot anxiously.
Annabeth scanned the crowd looking for messy black hair, and green eyes. She saw nothing but Romans. Then as if the crowd knew who Annabeth was looking for the Romans stood apart, making a pathway for two people.
The two people were in dark purple togas, they walked slowly as if in slow motion. Finally, after 8 months Annabeth...

So, The House of Hades is an underground temple in Epirus, Greece. That's where the Doors of Death are, in the mortal world, right?
Anyway, I have done some pointless research. So here anda go:

I found out that the temple is called The Necromanteion, which means Oracle of Death. It's a temple of necromancy devoted to Hades and Persephone.
The site was believed to be the Doors to Hades, which lead to the realm of the dead (kinda like the Doors of Death).
People used to come here to call upon their dead ancestors and talk to them. O.o
According to tradition, the temple was located on the banks of...