The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

An Amazonian hotel is the ultimate treehouse and provides stilt based accommodation.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

A gigantic sculpture garden is packed with innovative oddities.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

A research lab and hands-on museum where visitors can experiment with retro technology.

A school-themed restaurant where gastronomy is the core curriculum.

Nose around a unique collection of more than 300 natural aromas used to craft fragrances.

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

Nature's slip and slide.

With the touch of a button, you can read a randomly selected short story.

The only working large-scale tea plantation in the United States.

A sculpture for the sun and stars, created by Nancy Holt.

A striking public sculpture representing the period of martial law in Communist Poland.

One man's swirling six-acre monument of stone.

Extraordinary sculpture garden created by an eccentric English poet.

Unlock the secrets of the conjuring arts.

An optical Illusion once believed to be an electrical phenomenon.

360° views of the city plus five floors of optical illusions and hands-on science.

The world’s first hotel to be run by robots.