A huge musical instrument played by the ocean.

A modern mechanical planetary system, part of a 10,000 year clock.

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

San Francisco's newly reopened hands-on science museum.

This impressive tunnel was dug entirely by hand over the course of 36 years.

The curiosities and wonders of pharmacy in a delightful historic building.

A science teacher's dream.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

Enormous underground chamber built to detect 'ghost particles' of the universe.

A warm desert spring holds one of the rarest species on earth.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

New York City's smallest piece of private property.

Abandoned power station once home to a squatter community, now being developed into an arts center.

From scholastic to sepulchral - now under reconstruction.

Genesis of modern hydroelectric power.

Small museum dedicated to the founder of electromagnetic theory.

The history of radiation is on safe display at the foot of a radiation science laboratory.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

Collection of antique science instruments displayed in recreated 1870-1930 laboratories.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.