The centuries-old obelisk may have inspired J. R. R. Tolkien.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

Experience what life was like in Ireland during the Viking and medieval ages.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

The only surviving fragment of the lost Narragansett Pier Casino.

The oldest still-operating tavern in the United States was once owned by a pirate.

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

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

Here, at the “world’s longest art gallery,” you’ll find forty miles of ancient petroglyphs and pictographs.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A wooden sculpture sits rather out of place in this Mexican beach town.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

Home to items never before seen by the public.