I Should Go Here
Thimble Hall, in Youlgreave or Youlgrave (they can’t decide which) Derbyshire, England, is the smallest detached house in the world. This spacious cottage measures 11 feet by twelve feet and once housed a happy family of eight in the nineteenth century.
Jacob's Well is a significant karstic spring, the largest perennial spring in the Texas Hill Country. It flows from the most extensive underwater cave in Texas, opening in the bed of Cypress Creek, a few miles north of Wimberley, Texas. The twelve foot diameter mouth of the cave serves as a popular swimming and water recreation spot for the local land owners whose properties adjoin Cypress Creek.
I love these two.
10 Adventures in Texas' Hidden Hill Country.