Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

World's largest cave was only discovered in 1991, and now offers tours to the public.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

A haunting theme park is slowly being swallowed by the jungle.

The busy transport hub is home to the tallest airport slide in the world.

A winding, blood-red tunnel of hardened lava navigable by foot.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Discover the magic in the mundane in Iceland's Museum of Everyday Life.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

Staves, storm-calling, and of course, necropants.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This Viking-inspired miniature golf course features a pirate ship and views of Icelandic landscapes.

An encyclopedic collection of mammal penises.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

This museum houses an imposing skeleton army comprised of creatures great and small.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.