Open-air cremations in Colorado's self-proclaimed spiritual mecca.

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

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Sweden's "good old days" painstakingly re-created in a model village.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

Avant garde house of Pierre Cardin on the Cote d’Azur.

The fantastic architectural models of a French traveler.

400-year-old garden, restored to beauty.

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

This Parisian gem is one of the most incredible ethnographic museums in the world.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

A haunting collection of the vanished and disappearing natural world.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

France's most famous cemetery, with some of its most curious tombs.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A stunning garden filled with fantastical environmental folk art and sculptures.