An eccentric inventor's castle home with its own indoor weather system.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This tiny home was originally a narrow alleyway.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.