Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This free, take-a-book shop seems like a trick but isn't.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

This huge ship ran aground and has simply been left to sit there ever since.

This rocky spread has been squeezed up directly from the bowels of the earth.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

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

A clone of a cloned tree that was so important it allegedly had its own guards.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A computer bug so primitive it was an actual insect.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

People escaping slavery may have hidden inside a corpse vault.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

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

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.