"The House That Love Built" is shying away from "The House That Ghosts Love."

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A unique zoological park home to over 30 species of wild cats, both big and small.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

A striking 12th-century-style castle built on the edge of a cliff.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

This imposing 20th-century castle was abandoned before it was ever completed.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

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

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

The tallest residential building in Africa is an unsettling Brutalist monolith.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

270 million year-old forest of stone.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The magical, mossy forest that inspired Princess Mononoke.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

The fairy tale castle of the "fairy-tale king."

A whimsical village of unique treehouses resides in a Washington forest.

This abandoned Brutalist treehouse is a hidden architectural relic.