Learn Spanish (Latin America): Hay chapas dondequiera que camines.

The phrase dondequiera que (wherever) is almost always followed by the subjunctive because it refers to an indefinite or hypothetical place or action. You aren't talking about a specific route you know you will take, but rather any place you might happen to walk.

How exactly is the word dondequiera formed?

It is a combination of donde (where) and quiera, which is the subjunctive form of querer. It literally translates to something like "where it might please" or "where it may want", which gives us "wherever". It is followed by que to connect it to the next verb.

Could I use the emphatic sí que from this lesson in this sentence?

Absolutely. If someone didn't believe you about the mess, you could counter their expectation by saying, Sí que hay chapas dondequiera que camines (There sure are bottle caps wherever you walk). This emphasizes that the statement is true despite their doubts.

Is chapas the only word for bottle caps in Latin America?

While chapas is widely understood, many Latin American countries prefer to use tapitas or corcholatas (especially in Mexico) for metal bottle caps. Keep in mind that chapa can also mean a door lock, a metal sheet, or a badge depending on the exact region!