The Gaudí Crypt, inside the Colonia Güell, is the architect's most hidden treasure. A creation for which his mentor, Eusebi Güell, gave him freedom of budget, and it became the test laboratory for the construction of the Sagrada Familia.

This is the purest work of the artist, where he explores all his skills and improves his techniques.

It was declared a World Heritage Site by UNESCO in 2005 and in 2013 became the first monument with this recognition to obtain the Biosphere Certification for the sustainable management of its services.
Located within the Colonia Güell, an atypical industrial colony for its time where Gaudí and his friend Conde Güell put in practice the main technical advances of the time and also the newest social reforms.