At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This giant wooden treehouse within a sprawling garden has its own eatery.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The first museum in the world devoted to sexual gadgetry.

A unique sculpture park that specializes in the huge and bizarre.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

A taste of Middle Earth, in the middle of the Bayou City.

This eclectic Austin curiosity shop is home to all things strange and unusual.

This 19th century cyclorama acts like an analogue time machine to a different era.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The growing stones of Romania.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Gigantic Romanian salt mines used to heal respiratory conditions.

A stunning 18th century pharmacy and medieval chemist's collection.

Romania's only crater lake with water as pure as if distilled.

The Natural History Museum that time forgot.

A muddy alien landscape that is home to rare species of exotic plants.