Sayyliik
Sayylyk lies beside the Selennyakh in the long depression between the mountains of northeastern Siberia. The river rises at the meeting of the Khargy-Salaa and Nyamnya and flows eastward through the Moma–Selennyakh depression to join the Indigirka. Its valley cuts a route through a region of formidable ridges. Snow supplies much of the river's water, and ice covers it through the long northern winter.