Series of underground houses inhabited continuously for centuries.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Cuba's historical trains remind natives of their country's sugary sweet past.

A Spanish-style estate that has traded black ties for rock concerts.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

A garden in Lisbon filled with giant porcelain creatures.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

Spend your honeymoon where the Devil had his wedding.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.