World's Most Extreme Homes

Ruth visits a funky forest creature-inspired lake house in Sweden, a ball-shaped home for a soccer fanatic in Brazil and a modernist tree house in New Zealand.

Ruth explores a well-camouflaged home in the middle of a South African wildlife preserve, an eco-friendly Chilean home built in nine days and New Zealand home that feels like a conservatory.

Ruth explores a Dutch home in an iconic windmill, a colorful whale house in Mexico with organic lines and a self-sufficient home deep in the Australian outback.

Ruth tours a 1940s Dutch river barge that's been transformed into an elegant house, an airy minimalist home in Brazil and an enchanting straw bale house with reclaimed features designed by a New Zealand artist.

Ruth meets the owners of an English cottage in the clouds, an Australian home built inside a dugout and a South African indoor-outdoor home with panoramic views.

Ruth visits a stunning 500-year-old English country house, a coastal Brazilian treehouse in the rain forest and recycled materials home constructed by a special effects artist in New Zealand.

Ruth tours an eco-friendly flying saucer home in the French countryside, an indoor-outdoor home in rural Australia and a former royal banquet hall transformed into a majestic in pastoral England.

Ruth discovers a water tower with an ultra-modern house wrapped around the exterior in England, a renovated water tank filled with custom features in Australia and a rotating house of mirrors in New Zealand.

Ruth visits an eclectic Welsh lighthouse, an underground flower house in Mexico City and historic slim building in Amsterdam.

Ruth explores a historical lighthouse in the Netherlands that's only accessible by boat, a luxury hilltop getaway in Mexico owned by a former Bond girl and a self-sufficient New Zealand home with quirky custom features.

Ruth goes inside an ultra-modern underground home in London, a traditional lodge home in the middle of a South African nature preserve and a Dutch castle built in 1780 that's still in the family.

Ruth visits a castle in Germany that's been in the family for a couple hundred years, a modernist concrete and glass beach house on the Chilean coast, and an old New Zealand mill that wouldn't be out of place in the Wild West.

Ruth visits a New Zealand home clinging to the rock like a scallop shell, a jungle hideaway with contemporary interior design in South Africa, and a formidable English military tower transformed into a cozy three-level home.