Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

A beautiful deserted greenhouse in the middle of a park.

This enchanting rainforest hotel looks as though it grew from the forest itself.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

A vast Communist-era exhibition space in the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

"Holy Wisdom" overlooks the city that became its namesake.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Commonly acknowledged as the only public monument to the Devil himself.