Trips Places Foods Stories Newsletters

Take your next trip with Atlas Obscura!

Our small-group adventures are inspired by our Atlas of the world's most fascinating places, the stories behind them, and the people who bring them to life.

Visit Adventures
Trips Highlight
Puglia Italy - Matera
Italy • 8 days, 7 nights
Southern Italy: Castles, Caves & Coastal Treasures in Puglia
from
Turkmenistan Gates of Hell Darvaza crater
Turkmenistan • 10 days, 9 nights
Turkmenistan & the Gates of Hell
from
View all trips
Top Destinations
Latest Places
Most Popular Places Random Place Lists Itineraries
Add a Place
Download the App
Top Destinations
View All Destinations »

Countries

  • Australia
  • Canada
  • China
  • France
  • Germany
  • India
  • Italy
  • Japan

Cities

  • Amsterdam
  • Barcelona
  • Beijing
  • Berlin
  • Boston
  • Budapest
  • Chicago
  • London
  • Los Angeles
  • Mexico City
  • Montreal
  • Moscow
  • New Orleans
  • New York City
  • Paris
  • Philadelphia
  • Rome
  • San Francisco
  • Seattle
  • Stockholm
  • Tokyo
  • Toronto
  • Vienna
  • Washington, D.C.
Latest Places
View All Places »
Pinal Airpark
Note the chrysanthemum crests.
Hachiman Bridge
Clarendon War Memorial.
Clarendon War Memorial
This fried chicken is one of Bangkok’s most famous.
Gai Tord Jae Kee
Latest Places to Eat & Drink
View All Places to Eat »
This fried chicken is one of Bangkok’s most famous.
Gai Tord Jae Kee
Chefs Aruss Lerlerstkull and Atcharaporn Kiatthanawat lean into regional traditions.
Charmgang
The khao soi at Gedhawa comes with a rich, coconutty broth.
Gedhawa
At Nai Mong Hoi Thod, the oyster omelet is worth waiting for.
Nai Mong Hoi Thod
In this deceptively simple dish, top-quality ingredients are paramount.
Kor Panich
Recent Stories
All Stories Video Podcast
Most Recent Stories
View All Stories »
Haleakalā National Park’s summit region, shrouded in the pre-dawn fog.
Beware the Legends Behind These National Park Souvenirs
3 days ago
For Aguilar-Carrasco, nature is a powerful reminder of the interconnectedness of all life.
How Can National Parks Be Made Accessible to All? AO Wants to Know.
4 days ago
Podcast: Finding ‘The Great Gatsby’ in Louisville
5 days ago
Here’s which treats you can safely lug home without risking a fine.
Dear Atlas: What International Food Can I Legally Bring Into the U.S.?
6 days ago

No search results found for
“”

Make sure words are spelled correctly.

Try searching for a travel destination.

Places near me Random place

Popular Destinations

  • Paris
  • London
  • New York
  • Berlin
  • Rome
  • Los Angeles
Trips Places Foods Stories Newsletters
Sign In Join
Places near me Random place
All the United States Maryland Ashton-Sandy Spring The Triadelphia Bell
AO Edited

The Triadelphia Bell

This bell is one of the last remnants of the lost city of Triadelphia.

Ashton-Sandy Spring, Maryland

Added By
Ian Hall
Email
Been Here
Want to go
Added to list
Triadelphia Bell at Sherwood High School.   blimpcaptain / Atlas Obscura User
Triadelphia Bell at Sherwood High School.   blimpcaptain / Atlas Obscura User
Triadelphia Bell plaque.   blimpcaptain / Atlas Obscura User
Builder’s plaque.   blimpcaptain / Atlas Obscura User
David A. Brigham memorial plaque.   blimpcaptain / Atlas Obscura User
Triadelphia Bell at Sherwood High School.   blimpcaptain / Atlas Obscura User
Been Here
Want to go
Added to list

About

The city of Triadelphia was founded in 1809 by three brothers-in-law who were married to the Brooke sisters (daughters of Robert Brooke, founder of Brooksville).

From its inception until its dire demise by a deluge, Triadelphia grew to become an industrial powerhouse rivaling nearby Rockville in size. Powered by the mighty Patuxent River, cotton, grist, saw, and plaster mills churned out all types of products.

In 1868, a flood destroyed almost all of the mills in Triadelphia along with many homes. Only the grist mill remained. Efforts were made to rebuild the mills, but in 1889, the same deluge that caused the Johnstown Flood wiped out all that remained. Ultimately, the decision was made not to rebuild Triadelphia. The final death blow came with the completion of Brighton Dam in 1943 which resulted in the last existing portion of the town being submerged underwater.

Aside from the bell, the only other known element of Triadelphia that is still extant is a graveyard on a hill overlooking the former town.

As for the bell, it was originally used to call mill workers to perform their daily duties. After being acquired by Sherwood High School principal Alice Farquhar in 1902, the bell was used for 50 years to call students to the school.

In 1954, the bell was dedicated as a gift from that year's graduating class to the future classes. The stone structure that houses the bell was adorned with a memorial plaque after the passing of David A. Brigham in 2003. Brigham, an esteemed local humanitarian was Sherwood's Class President in 1961.

Related Tags

History & Culture Industrial Schools Belltowers

Know Before You Go

The Triadelphia Bell is suspended in a bell tower that was built using stones from a factory building in Triadelphia. These were from the same haul that was used to build the stone fireplace at the nearby Olney Ale House.

Community Contributors

Added By

blimpcaptain

Edited By

specs1624

  • specs1624

Published

July 21, 2021

Edit this listing

Make an Edit
Add Photos
Sources
  • https://mocoshow.com/blog/mocos-lost-city-triadelphia/
  • https://www.sandyspringmuseum.org/village/triadelphia/
The Triadelphia Bell
300 Olney Sandy Spring Rd
Ashton-Sandy Spring, Maryland, 20860
United States
39.148113, -77.019495
Get Directions

Nearby Places

Underground Railroad Experience Trail

Ashton-Sandy Spring, Maryland

miles away

The Red Door Country Store

Silver Spring, Maryland

miles away

National Capital Trolley Museum

Silver Spring, Maryland

miles away

Explore the Destination Guide

Photo of Ashton-Sandy Spring

Ashton-Sandy Spring

Maryland

Places 2

Nearby Places

Underground Railroad Experience Trail

Ashton-Sandy Spring, Maryland

miles away

The Red Door Country Store

Silver Spring, Maryland

miles away

National Capital Trolley Museum

Silver Spring, Maryland

miles away

Explore the Destination Guide

Photo of Ashton-Sandy Spring

Ashton-Sandy Spring

Maryland

Places 2

Related Places

  • Östra Torp, Sweden

    Kalkugnarna

    Preserved 19th-century lime kilns sit in southern Sweden.

  • The Japanese Language School Memorial in Tacoma, Washington.

    Tacoma, Washington

    Japanese Language School Memorial

    This site was a school and a center of Japanese-American life before internment.

  • Velha Goa, India

    Gate of St. Paul's College

    All that remains of a 16th-century Jesuit school is this carved, worn gate.

  • Lanesfield welcoming Atlas Obscura visitors

    Edgerton, Kansas

    Lanesfield Historic Site

    Built in 1869, this one-room rural schoolhouse welcomes visitors to travel back to 1904 school day.

  • Franklin, Massachusetts

    Birthplace of Horace Mann

    A stone marker dedicated to the “Father of American Education.”

  • Giant Wool Wagon

    Kojonup, Australia

    Giant Wool Wagon

    This large replica wagon tells the story of the booming wool industry in this small Australian town.

  • Bemposta, Spain

    Ciudad de los Muchachos

    The ruins of the second-largest circus school in the world.

  • Bacalar, Mexico

    Bacalar House of Culture

    This city's cultural center is in a restored Spanish colonial home from the 1800s.

Aerial image of Vietnam, displaying the picturesque rice terraces, characterized by their layered, verdant fields.
Atlas Obscura Membership

Become an Atlas Obscura Member


Join our community of curious explorers.

Become a Member

Get Our Email Newsletter

Follow Us

Facebook YouTube TikTok Instagram Pinterest RSS Feed

Get the app

Download the App
Download on the Apple App Store Get it on Google Play
  • All Places
  • Latest Places
  • Most Popular
  • Places to Eat
  • Random
  • Nearby
  • Add a Place
  • Stories
  • Food & Drink
  • Itineraries
  • Lists
  • Video
  • Podcast
  • Newsletters
  • All Trips
  • Family Trip
  • Food & Drink
  • History & Culture
  • Wildlife & Nature
  • FAQ
  • Membership
  • Feedback & Ideas
  • Community Guidelines
  • Product Blog
  • Unique Gifts
  • Work With Us
  • About
  • FAQ
  • Advertise With Us
  • Advertising Guidelines
  • Privacy Policy
  • Cookie Policy
  • Terms of Use
Atlas Obscura

© 2025 Atlas Obscura. All Rights Reserved.