Quinta da Regaleira - built in
the 20th century, this private residence (and the surrounding
grounds) has secret passageways, towers, gardens and caves.
I visited a friend in Lisbon about 3 weeks ago
and this had to be my FAVORITE place. It was raining the day we went
and there were few tourists. We ducked into some of the grottos to keep
dry...unfortunately, we didn't take our flashlights. But bumped into
a German couple emerging from the Initiation Well..they gave us the
heads up to keep going and our lack of night vision was rewarded with
the Well...how cool!