Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

Malcolm X's house during his most formative years faces an uncertain future.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

A little Lego easter egg is hidden underwater in the Boston Tea Party tableau at Miniland.

This old mill and former police station now present a world-class collection of Orthodox iconography.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

"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."

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

Heralded as the oldest statue in London.

Mysterious installations bring levity and light to a sometimes stodgy city.