Repurposed space and ultra-modern construction collide to create this geometric wooden spectacle.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

One of the world's largest ice festivals dazzles visitors for over a month with radiant sculptures and carvings.

The world's first ice hotel is still one of the most elaborate and beautiful.

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

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

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

No one is exactly sure why over a hundred lakes have formed amongst the tallest sand dunes on Earth.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

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

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.