This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

Eastern Canada's ocean playground.

Memorial to a beloved puppeteer as well as all street performers.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

Painstakingly built dioramas sit unnoticed in a Boston office building.

Statue commemorating the use of ether in anesthesia.

The Boston square dedicated to the dark poet who was born nearby.

A men’s restroom became a sandwich shop.

Millions of numbers carved in glass represent the tattoos forced upon victims.

The site of Paul Revere's historic two lantern warning.

"Mock all and sundry things, but leave the saints alone."

A collection of full-size movie monsters opened to the public.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A museum dedicated exclusively to the lore and history of ouija boards.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

An eccentric inventor's castle home with its own indoor weather system.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

The local community brought back this land to transform it into a nature preserve.