knowledge - Double features: The wrap-up

<sub>This puzzle is the final part of the Double feature series (first part here).

Note: This answers gives away the answers to previous puzzles.</sub>

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The answers to the twelve Double feature puzzles are listed below. (Spoilers ahead – you've been warned twice now.) Use the answers and the given grid to answer the question: Where are we?

scariest monsters
mole species
unaccompanied solo

sauna's temperature
animal mitochondria
hasten foreclosure
more significant
mail shipment
arouse criticism
meal replacements
processing units
successive pairs

Answer

In each answer:

One of the two words anagrams to a national capital.

As hinted by the given image:

The capitals should be sorted from west to east. Then, every answer has a word left over, which should also be considered.

So, when this is done:

sauna's temperature - NASSAU, the bahamas / Temperature 77.4°W mail shipment - LIMA, peru / sHipment 77.0°W arouse criticism - ROSEAU, dominica / crIticism 61.4°W scariest monsters - CASTRIES, st lucia / monSters 60.9°W mole species - LOMÉ, togo / specIes 1.2°E successive pairs - PARIS, france / succeSsive 2.3°E processing units - TUNIS, tunisia / procesSing 10.2°E unaccompanied solo - OSLO, norway / unaccomPanied 10.7°E more significant - ROME, italy / significAnt 12.5°E hasten foreclosure - ATHENS, greece / foreclosuRe 23.7°E meal replacements - MALÉ, maldives / replacemenTs 73.5°E animal mitochondria - MANILA, philippines / mitochondriA 121.0°E

Reading down the diagonal of the remaining words (first letter of the first, second letter of the second, etc.) spells THIS IS SPARTA.