This 19th-century shopping arcade has charming, unusual stores like a luthier workshop and even the local Esperanto Association.

This mountainside open-air museum was built from the ashes left behind by a devastating fire.

A poet in love with the Parana River built this unique house that became a landmark.

Trash-filled shrines to an unofficial saint known for her endless breast milk dot the highways of Argentina.

One man's quest to collect artifacts from every aspect of human life has resulted in this eclectic Argentinian museum.

Visit this odd display of indigenous style in Argentine wine country.

A tower devoted to — and modeled after — the Divine Comedy.

Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

An Argentinian businessman facing terminal cancer built this whimsical medieval village using salvaged materials.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The district's only illusionarium supports free writing programs for local students with every purchase.

The 28,000-year-old specimen is remarkably intact.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

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

Sip creative cocktails in the former vault of the Riggs Bank.