Water-powered gadgets whirr to life in this quirky eco park.

These two delightful animal-shaped buildings host a visitor center and wool shop.

A steampunk airship "floats" above Hamilton Gardens delivering plants and compost.

An abstract monument to a symphonic composer.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

These mysterious mazes carved on the rock may be up to 4,000 years old.

Perhaps the only prehistoric monument with its very own public bus stop.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

At the United Kingdom's only residential library you can sleep among the books.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

Take a sea tractor to the Art Deco hotel on the island that inspired Agatha Christie.

An enigmatic natural rock formation with a manmade passage cut through the center.

The remains of centuries of copper mining appear like an alien landscape.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

A museum marks and documents the site of the Titanic's launch.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.