"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This landmark cemetery in Boston was created more than 300 years ago.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

A mysterious collection of stones stand outside a small New England town.

The massive machine creates cracking displays of indoor lightning.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

An original apothecary from 1792.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A historic cemetery filled with quirky faux wood art and unique tombstones.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The span is crooked and made from two older recycled bridges.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.