Shell Grotto

Shell Grotto is an underground structure in Margate with passages whose walls and ceilings are completely covered with millions of shells arranged in elaborate mosaics. The passages wind through several chambers and show the careful craftsmanship that shapes every surface.

The structure was discovered in 1835 when James Newlove found the underground passage, and it was opened to visitors shortly after. Its origin and original purpose remained unknown from the start, making it a mystery.

The shell decorations display trees, celestial symbols, and geometric patterns made from shells collected at the nearby coast. Visitors can observe these handcrafted details on walls and ceilings, noticing the skill required to arrange them.

The grotto stays at a constant temperature year-round and is pleasant to visit in any season. Access is through a narrow staircase leading to the underground chambers, so keep in mind there are no wide passages.

A rectangular chamber inside displays especially elaborate shell arrangements that some visitors connect to ancient civilizations or secret societies. These connections are speculation, however, and the actual meaning of the arrangements remains unclear.

Location: Thanet

Accessibility: Wheelchair inaccessible

Fee: Yes

Address: Grotto Hill

Opening Hours: Wednesday-Sunday 10:00-17:00

Phone: 01843220008

Website: https://shellgrotto.co.uk

GPS coordinates: 51.38775,1.38943

Latest update: December 12, 2025 17:21