Statue commemorating the use of ether in anesthesia.

Hackney's newest private museum and natural curiosity shop.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

Floating swimming pool within a moored vessel.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A fascinating insight into daily life in the Eastern Bloc.

A clock designed to run with perfect accuracy for 10,000 years.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

An architect transformed this abandoned cement factory into his castle-like workshop.