A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This neighborhood thoroughfare is haunted by dozens of homemade monsters.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

A collection of haunted objects and macabre oddities under one roof.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A (slightly) grownup take on the classic retro arcade.

This Seattle store is packed with all sorts of curious creatures and creations.

Couple's personal collection of pinball machines turned public pinball museum.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Sniff the Titan Arum's rotting flesh.

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

Try not to get slimed in Tribeca.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

Tour the sci-fi-esque reality of governmental disease management.